Malicious PDF — malware analysis report

Static analysis result for SHA-256 30aee1b19709793e…

MALICIOUS

PDF

97.5 KB Created: 2021-05-28 17:23:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6eec0aa30d98c09c73a307d9a597a8f8 SHA-1: 53e56f10c28d185b0c8eb71e8185647432f361f6 SHA-256: 30aee1b19709793e012cfe33fad4330d66f3b76d808355d37ec405b2806bb9a7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, many hosted on Weebly, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, appears to be related to a crossword clue, likely a lure to direct users to malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ponafet.ru/strik?utm_term=manhattan+tattoo+show+crossword+clue
    • https://lexikujufuwu.weebly.com/uploads/1/3/4/6/134613894/1884234.pdf
    • https://lakiregatu.weebly.com/uploads/1/3/4/5/134589313/xidulexewev.pdf
    • https://povominuvuz.weebly.com/uploads/1/3/5/9/135961678/weruxun_monotow_mofadul.pdf
    • https://juwimifabofif.weebly.com/uploads/1/3/4/3/134369341/7863888.pdf
    • https://runobutadafe.weebly.com/uploads/1/3/0/9/130969205/9aeffff65.pdf
    • https://static.s123-cdn-static.com/uploads/4382779/normal_5fffac737587d.pdf
    • https://xilanulutoras.weebly.com/uploads/1/3/4/0/134016814/9156678.pdf
    • https://cdn-cms.f-static.net/uploads/4463809/normal_601624a8430e3.pdf
    • https://nuniladolu.weebly.com/uploads/1/3/0/7/130775245/lesuxetizejagat.pdf
    • https://rizibibaruf.weebly.com/uploads/1/3/5/3/135383358/9694479.pdf
    • https://cdn-cms.f-static.net/uploads/4401696/normal_60206301b206e.pdf
    • https://bevevigulamop.weebly.com/uploads/1/3/4/7/134759368/xobaxulalezu.pdf
    • https://cdn-cms.f-static.net/uploads/4450883/normal_5fd81628e6134.pdf
    • https://pobanebutu.weebly.com/uploads/1/3/4/5/134592169/7246970.pdf
    • https://vevitukag.weebly.com/uploads/1/3/7/5/137506107/1536644.pdf
    • https://gisafumeg.weebly.com/uploads/1/3/6/0/136098567/jijesuzaga.pdf
    • https://tisavivo.weebly.com/uploads/1/3/4/0/134040567/9910449.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/02adaa35-5bee-45c4-95b7-6bd1ccdfd623/teachers_guide_grade_11_oral_communication.pdf
    • https://uploads.strikinglycdn.com/files/da10698b-12c4-4751-879d-859c51285d92/boy_scout_christmas_tree_sale_near_me.pdf
    • https://uploads.strikinglycdn.com/files/3d6d9e83-535b-4038-acd6-a2e9703c738c/27478041250.pdf
    • https://uploads.strikinglycdn.com/files/f36c3d29-2eb1-48ad-8d3a-dc3fc7bf208e/diana_her_true_story_hardback_book.pdf
    • https://uploads.strikinglycdn.com/files/d9ad1f0e-c7a8-42c5-bbff-f61217546563/fl_studio_for_mac_free_reddit.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014085.bin
39468fb2ef85b0e4f1c612711b26ea3185744153b242af1f04fe1f21adb83560		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14085 5124 bytes
font_01_sfnt_off00015206.bin
fcc3176a925953b11be6b368c0728f4b37b1dbf8fd1b2cb45983b6a16f37af64		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15206 11456 bytes

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