Malicious PDF — malware analysis report

Static analysis result for SHA-256 7393544215b3d126…

MALICIOUS

PDF

96.0 KB Created: 2021-06-29 02:19:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: bc0b92d9dc25fa9e6be930ca617fa79d SHA-1: be2aad61b706ab1d986597a1452696c65a76451f SHA-256: 7393544215b3d126faf36b4520289da11e5508e2e8883dbbc29a83695487c063
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. The heuristics suggest it functions as a link farm, potentially directing users to malicious content hosted on compromised CMS upload storage or disposable hosting. The 'SE_CALLBACK_LURE' heuristic specifically points to a callback phishing or tech-support scam pattern, where the document likely prompts the user to call a phone number for a fabricated issue.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9806

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://foto-preiss.at/upload_files/files/97336544724.pdf In PDF document text
    • https://psystat.net/candyticket/uploads/page_images/files/32570492085.pdfIn PDF document text
    • http://am-assets.com/aom/magnolia/userfiles/file/rovisemez.pdfIn PDF document text
    • http://www.aportecnica.com/imagenes/editor/file/wataneniremoresovagafeso.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160bbabfe1eb39---6830737813.pdfIn PDF document text
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b4ab565d0af---38604643662.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/tsnc19mdatcnr9s8ed52ut4701/49991427573.pdfIn PDF document text
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/dfef42833259a251cd2dde8c0b35499a/49879057042.pdfIn PDF document text
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7ebba0991---91599901652.pdfIn PDF document text
    • http://jshtextile.com/UserFiles/file///35652400622.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1607c7102aceb9---7446583512.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b44ff13080b---roxarasolivokiwanubap.pdfIn PDF document text
    • http://beytarimcilik.com/admin/editor_resim/file/giwifigerisilafajanub.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/16099637ead506---malivatizanelope.pdfIn PDF document text
    • http://oticonshop.net/ckfinder/userfiles/files/melipokezaralufigek.pdfIn PDF document text
    • https://www.skyline-recruiting.com/wp-content/plugins/super-forms/uploads/php/files/4763bebc728d2ef545dcc356c4519a08/81797593920.pdfIn PDF document text
    • https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4baf6e6af4---76603696028.pdfIn PDF document text
    • http://zae.me/datafiles/file/zizas.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/795485ecb0c3ffbe935decba88d74982/42942432454.pdfIn PDF document text
    • https://www.westcountrystoves.co.uk/wp-content/plugins/super-forms/uploads/php/files/4cbee00559c386ceaf5f6af9dc5e7052/naxiruma.pdfIn PDF document text
    • http://alarcon-v.com/editor_upload_image/file/19980136181.pdfIn PDF document text
    • http://ondrejkocar.cz/img/file/40769431046.pdfIn PDF document text
    • http://kibbkw.com/uploads/file/30111560084.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160843e25d7a83---17684049073.pdfIn PDF document text
    • http://allaboutdowney.com/userimages/gopojuzik.pdfIn PDF document text
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/38d1d423d85d102ecf9ee1d1c9493091/7011213975.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b4306ee2c8---lozoduzesukebefopuj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=manual+g35+coupePDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011335.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11335 10492 bytes
SHA-256: f8ff97eb09d33261b973c91c2d592b14896ed1326356c3d34ceacf7d21c3ca00
font_01_sfnt_off00012b30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B30 18012 bytes
SHA-256: ad1aa498fea5544b727ecc8eed91c9e1e21e37d3049bba649771834faf7c621e
font_02_sfnt_off00015a9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A9F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1