Malicious PDF — malware analysis report

Static analysis result for SHA-256 562ef2a6f86b9773…

MALICIOUS

PDF

96.5 KB Created: 2021-08-23 11:01:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: c9397c46b220a8d96530ec76adc155d9 SHA-1: e6785f87e0217aa820fefc4f54dc926c686c061c SHA-256: 562ef2a6f86b97732d2a67d3c55d082b586c48006b91d1f1b37c72b20049bc84
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It functions as a link farm, directing users to multiple external URLs, some of which are hosted on compromised CMS platforms. The presence of urgency language further supports a phishing pretext, aiming to trick users into clicking the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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 https://mariellatriolo.it/public/file/raxamezovujurexafazo.pdf In PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca8703dd33---muwuwikoz.pdfIn PDF document text
    • http://cortabellanews.com/userimages/49853881339.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/qte2p9j8ccf68hagtd4vbcf11k/18915950073.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/160774347b757d---tezuwanaje.pdfIn PDF document text
    • https://www.federatedlighting.com/wp-content/plugins/super-forms/uploads/php/files/83b96e0a34d5a2c11de02834a325d2e9/67422058450.pdfIn PDF document text
    • http://www.casasemio.com.br/ckfinder/userfiles/files/71433422118.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/44769f3538a9eaf991f5be2c41e0cf2c/90135415330.pdfIn PDF document text
    • http://sochisushi.nl/survey/userfiles/files/18098777211.pdfIn PDF document text
    • http://grappin-annat-como.com/userfiles/grappin-annat-como.com/file/jiporabuwedudomovuval.pdfIn PDF document text
    • http://allmedicus.com/userfiles/file/86890749656.pdfIn PDF document text
    • https://veljun-ldm.hr/files/7884093469.pdfIn PDF document text
    • https://lesartsdansmonjardin.com/userfiles/file/20210812050900.pdfIn PDF document text
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/ecfa96804653f958a7d3fc7da5236c63/71794012778.pdfIn PDF document text
    • http://stalmost.pl/userfiles/file/pojigimunaluxudixagu.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f2287be2f1---93572520564.pdfIn PDF document text
    • https://akproauto.com/nbloom/fckuploads/file/55366217982.pdfIn PDF document text
    • http://spoanalyze.com/wp-content/plugins/super-forms/uploads/php/files/9768f413b3cb155fd6c468ba3d192893/mefazog.pdfIn PDF document text
    • http://africanhairbraidingsalon.com/userfiles/file/wajifero.pdfIn PDF document text
    • https://wonwon.taipei/photo/file/30023393731.pdfIn PDF document text
    • http://dobrejaja.com/Upload/file/21401752954.pdfIn PDF document text
    • http://cintabogor.com/Uploads/userfiles/files/43279411973.pdfIn PDF document text
    • http://bosch-service-center.ru/uploads/files/15272267923.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=of+fire+and+stars+free+pdfPDF 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_off00011577.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11577 10348 bytes
SHA-256: 5b4604657dbe2b18027341cefabd45c602ad7d00e1b6e5cd466e426a2ab5a83a
font_01_sfnt_off00012cfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CFA 17508 bytes
SHA-256: 275bb3ed5cf33f3e3b5a5137a58f977b2188d4ee0c6aee4ddc6e55257aad5ebb
font_02_sfnt_off0001599c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1599C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1