Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ef07ae624a2dd53…

MALICIOUS

PDF

96.7 KB Created: 2021-07-15 14:20:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 2d5e1593ae3d68a1a0967a33876f218e SHA-1: 2f856439721fdaf8cd71d412d70a0949542308a4 SHA-256: 5ef07ae624a2dd53da97e10111fe94c93f1693c4447fe4100a1e3ee6ccbfe999
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised websites, suggesting a phishing or malware distribution campaign. The presence of multiple PDF link farm heuristics further supports this, indicating the PDF is designed to redirect users to potentially harmful content hosted on these sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9806

Heuristics 6

  • 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.
  • 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://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/354c58pqsgvd3n2uqkj1moudlb/30244810331.pdf In PDF document text
    • https://www.ideaklinik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607414c9355da---jugonexe.pdfIn PDF document text
    • https://wrd13.com/force/file/fupuz.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/7up872n5lsurgdbifo9arp9063/mafukatevevedaba.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d4c7fd9dde---56938394971.pdfIn PDF document text
    • http://aimecostruzioni.it/userfiles/files/wifumizifa.pdfIn PDF document text
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/5b5b29cda09f41f810a51e76d2e3a0e6/tipabumamudoxarinunagita.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071f2b85c676---37702917534.pdfIn PDF document text
    • https://corpusbg.com/files/fck/file/waritaxipozifamaneju.pdfIn PDF document text
    • http://www.petercar0937494634.com/upload/img/files/36295355541.pdfIn PDF document text
    • http://toyotarent.kr/FileData/ckfinder/files/20210625_187D6E48CB47AF69.pdfIn PDF document text
    • http://studiovalentini.eu/userfiles/files/gonexujiwedukejulesoli.pdfIn PDF document text
    • https://autoradiator.mn/uploads/ckfinder/files/jovixegir.pdfIn PDF document text
    • http://newmob.it/userfiles/files/torixep.pdfIn PDF document text
    • https://gaziemirkentkonseyi.com/upload/files/gotegowapefimedefukinovir.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/db06bed431060a5f80a423bc782e3ac8/sepodi.pdfIn PDF document text
    • http://mrsinternationalbeautypageant.com/clients/8/8c/8c0f0497d7166b07b5568c04be8084ca/File/sefumugokivamibubi.pdfIn PDF document text
    • https://trexanh.net/upload/files/5318733613.pdfIn PDF document text
    • http://headlinesdinerla.com/uploads/files/21998062479.pdfIn PDF document text
    • http://vina2002.com/uploads/files/ginufud.pdfIn PDF document text
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/9eb1b63888827cf98c21462fcd9df185/xanakadarajuva.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16072464954b09---fadirisew.pdfIn PDF document text
    • http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160848c1e3b145---33246012627.pdfIn PDF document text
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/499062d530be1c7fb2d35573e0ecc3d0/13711693259.pdfIn PDF document text
    • https://sunarchegypt.com/userfiles/file/lodik.pdfIn PDF document text
    • http://gulfcoolcontracting.com/uploads/userfiles/file/file/xunago.pdfIn PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160809c9dec506---zaviguzegokokubuwiradidot.pdfIn PDF document text
    • http://flygarfield.net/userfiles/file/ladufo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=is+bear+an+omnivore+animalPDF 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_off000117b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117B0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012fc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FC7 10328 bytes
SHA-256: 8b7d814cc1cc01c129207bc05ebcc20797a55753ad36c00a35ff45b926d82a60
font_02_sfnt_off00014705.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14705 17644 bytes
SHA-256: 684eadba38068ab0e27c956e297b9bee6f13d29226ced59e90c01dcdcc9efdec

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