Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ab6fe9f1f9674c6…

MALICIOUS

PDF

108.1 KB Created: 2021-04-15 15:34:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 28250dbbb5e21d1472794145a92d77c6 SHA-1: 924643f7f5cb0d4d25058aa1d998d446ee453661 SHA-256: 9ab6fe9f1f9674c6856b8d7c86c6a95b2595ef96cd1fe2bdcaa4b5f171c3a512
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains a large number of external links, many hosted on Weebly, suggesting a link farm or redirection scheme. While no scripts were explicitly extracted, the presence of embedded URLs and the overall structure point towards a phishing or malicious redirection attack, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://xezojetit.ru/strik?utm_term=sparknotes+go+ask+alice+quotes
    • https://bikewodeganesu.weebly.com/uploads/1/3/4/5/134596115/jerimimu.pdf
    • https://xetupowo.weebly.com/uploads/1/3/1/3/131382232/8c9add1221b.pdf
    • https://fimuxexepal.weebly.com/uploads/1/3/4/6/134615427/8881091.pdf
    • https://vasinurevesodux.weebly.com/uploads/1/3/4/6/134605286/3801427.pdf
    • https://simisodiguguvig.weebly.com/uploads/1/3/5/3/135324772/9f6e0cac90.pdf
    • https://cdn-cms.f-static.net/uploads/4421970/normal_5fd1c7ac84449.pdf
    • https://kusudojisopev.weebly.com/uploads/1/3/4/7/134774064/silagepu.pdf
    • https://cdn.sqhk.co/dijabidasu/imEibjd/bamidoju.pdf
    • https://cdn.sqhk.co/tokarikadez/TuhhjdK/fortnite_nintendo_switch_tips_and_tricks.pdf
    • https://siropenisawad.weebly.com/uploads/1/3/4/3/134353493/cdac5.pdf
    • https://ramakizuwag.weebly.com/uploads/1/3/4/3/134321509/b7b54ea.pdf
    • https://cdn-cms.f-static.net/uploads/4394060/normal_6015943b9d78d.pdf
    • https://cdn-cms.f-static.net/uploads/4383912/normal_60148e0cb3dfd.pdf
    • https://lovarewido.weebly.com/uploads/1/3/4/3/134322716/7969eaea4.pdf
    • https://mavilefisubagar.weebly.com/uploads/1/3/1/6/131606233/xedufagav_josatariman.pdf
    • https://novunafa.weebly.com/uploads/1/3/1/3/131379228/d9f187326f9.pdf
    • https://jevakotimafunu.weebly.com/uploads/1/3/4/8/134878594/960092.pdf
    • https://static.s123-cdn-static.com/uploads/4424689/normal_6006c72b25039.pdf
    • https://cdn-cms.f-static.net/uploads/4418786/normal_601b67543dd38.pdf
    • https://kasutuwisuruja.weebly.com/uploads/1/3/1/8/131872017/pogazufibol.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/5dc97b5d-090d-4867-a7fb-0a5359ec3565/22276045391.pdf
    • https://uploads.strikinglycdn.com/files/0a8cd78c-d553-47dd-8bba-be0a59efdde1/how_to_success_in_network_marketing_in_hindi.pdf
    • https://uploads.strikinglycdn.com/files/95acc5dd-9286-4ee6-b604-b9d141244c3a/64320792791.pdf
    • https://uploads.strikinglycdn.com/files/79c055e6-f225-4a88-9015-4fc1ed8efda2/how_many_calories_are_in_12_krispy_kreme_donuts.pdf
    • https://uploads.strikinglycdn.com/files/6a09796a-8786-4c3c-92e9-b6828e601767/73404398663.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_off000167f9.bin
0566a8f6610f0a95d8d82e90e766ce076b1350bbb40af889efa45e1b85495777		 pdf-font-stream PDF embedded font (sfnt) at offset 0x167F9 5392 bytes
font_01_sfnt_off00017a63.bin
3c219672648f1f708c82c89456f36d9612d1c8029d4eca061f2feaabd2c8e8f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17A63 11332 bytes

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