Malicious PDF — malware analysis report

Static analysis result for SHA-256 9362a7b3e03c9ad2…

MALICIOUS

PDF

86.8 KB Created: 2021-09-05 12:14:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: a1e89ca7f91aa5e2809678139a169525 SHA-1: d1024ceb7738ae783a391f91cd02334dca04cf6d SHA-256: 9362a7b3e03c9ad254ac11bc5de21ef70060a5e1f694d913cb000c5fc03ef13d
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The file's structure as a link farm suggests it's designed to lure users to external, potentially malicious, sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • 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.
  • 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://abw10thstreetne.com/uploads/files/60340388570.pdf In PDF document text
    • http://linkipt.com/_UploadEditor/files/40700521613.pdfIn PDF document text
    • http://lws-realestate.com/userfiles/files/mekibibojiwivug.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071defeafa04---83516733306.pdfIn PDF document text
    • https://hyundaia.ru/userfiles/file/48862789916.pdfIn PDF document text
    • https://adasms.fr/userfiles/file/60141550641.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16106d3875b581---39229167824.pdfIn PDF document text
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/6ad7da3769f522e135d8db0fe8013fd9/zekevisabinejo.pdfIn PDF document text
    • http://innovad-ltd.com/userfiles/file/95693415770.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9700a97a2---7611557483.pdfIn PDF document text
    • http://chandigarhdatarecovery.com/files/file/kupowopesine.pdfIn PDF document text
    • http://brandnewgoods.net/userfiles/file/wiriberawusik.pdfIn PDF document text
    • https://nolimitscenter.be/peausitive/images/FCKeditor/file/31714875761.pdfIn PDF document text
    • https://endeligmandag.no/e-brev/data/div/33644281715.pdfIn PDF document text
    • http://terwaarde.be/ckfinder/userfiles/files/50552750533.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/161086b9b60cde---49546931694.pdfIn PDF document text
    • http://kesherisrael.com/uploadEditor/files/fifite.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160de14352cd4e---95859694879.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/16102ef12ae45e---revogonivetozevorese.pdfIn PDF document text
    • https://soalmatematik.com/userfiles/file/67848369833.pdfIn PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/52cd7ce885eeb40227a6dfd0da3237be/zupidafepuxatu.pdfIn PDF document text
    • http://rideabikenews.com/user_img/files/kevikonepabatax.pdfIn PDF document text
    • http://mhinflatable.com/upload/file/fisupojobitunot.pdfIn PDF document text
    • http://srihemkuntsahibfgp.org/hemkunt/userfiles/file/xewog.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=comportamiento+del+consumidor+schiffman+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_off0000eb02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB02 11016 bytes
SHA-256: 830cfbda1af9f5413d24f0c475e196b4f432b123a0e96c62f1cc889b74469611
font_01_sfnt_off00010465.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10465 18992 bytes
SHA-256: 8a1e372235c63458de5b844bf857c76a97824fccff0be6f83aa39ff198bd3004
font_02_sfnt_off00013568.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13568 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1