Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c0e034ad6466940…

MALICIOUS

PDF

70.0 KB Created: 2021-03-08 13:51:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 1f81f2dc967bb69f18302f91dd3a9850 SHA-1: 7a549c6baac415b9138b9a4a727c9df5a420195d SHA-256: 3c0e034ad64669408b42af35fdcf8b5ae96fc03234310933a0764af51778c8ae
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • 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.
  • 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://xezojetit.ru/wix?keyword=porter+cable+hammer+drill+corded PDF link annotation
    • https://cdn.sqhk.co/gadewekunel/sLjeoZ8/13185172904.pdfIn PDF document text
    • https://cdn.sqhk.co/murafabu/PibS3ib/.pdfIn PDF document text
    • https://vogoworelo.weebly.com/uploads/1/3/4/2/134266182/7887712.pdfIn PDF document text
    • https://cdn.sqhk.co/nukasiwesex/wjbvhi8/download_football_manager_2020_for_mac_free.pdfIn PDF document text
    • https://volilisaxox.weebly.com/uploads/1/3/1/4/131453747/bifubetidepu_binafebofenipa.pdfIn PDF document text
    • https://cdn.sqhk.co/vovewotutal/gMhbZgg/vidasupizoturikulawereb.pdfIn PDF document text
    • https://dunifavopugi.weebly.com/uploads/1/3/5/3/135312205/2289e5e06.pdfIn PDF document text
    • https://cdn.sqhk.co/ragejeli/Ehaifgi/zivuxinot.pdfIn PDF document text
    • https://cdn.sqhk.co/sixepatexup/i6hh2ge/brawl_stars_wallpaper_4k_leon.pdfIn PDF document text
    • https://cdn.sqhk.co/vefapatape/2ndfTnC/barcode_scanner_attachment_for_android_phone.pdfIn PDF document text
    • https://cdn.sqhk.co/redexisa/f0jcie2/battle_balls_royale.pdfIn PDF document text
    • https://runogobikekeg.weebly.com/uploads/1/3/5/3/135350887/2e4f5fbbb8382.pdfIn PDF document text
    • https://cdn.sqhk.co/kupovite/hjjigDX/rogoxiv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://0b21792c-a699-4cf4-8833-5910c6ad58af.filesusr.com/ugd/b0b521_53fc826c11f7482c9b532a138602a5ec.pdf?index=trueIn PDF document text
    • https://91313464-3f42-441e-b0e8-b27065d471ad.filesusr.com/ugd/ee9d3f_89ff7d69e43c4d8098dc256cb8ed7af3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sedimeraxufi/complete_university_guide_2019_economics.pdfIn PDF document text
    • https://s3.amazonaws.com/kizugokofo/16614394476.pdfIn PDF document text
    • https://s3.amazonaws.com/fajetufekejo/36698368347.pdfIn PDF document text
    • https://d80868e2-5d34-4dda-9345-0396294a35aa.filesusr.com/ugd/f9fac6_9bbf3e1a7df24715bb45d378178c995b.pdf?index=trueIn PDF document text
    • https://6196a4e6-b3b5-4a85-a139-4ec84e0a53d9.filesusr.com/ugd/d01287_9aefe37ee6cd4722a5d50a8cbce17227.pdf?index=trueIn PDF document text
    • https://937a8a2d-b41a-4163-aff8-eda6db263557.filesusr.com/ugd/21e6f2_122521620926490d8ef526d9b21974f6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bulujono/academic_writing_topics.pdfIn PDF document text
    • https://3f735f5a-cd1c-4288-bd93-adeff6e084d9.filesusr.com/ugd/bcc0e4_83a9912cc8ef49579d5775f2ae2d3e07.pdf?index=trueIn PDF document text
    • https://493f174a-a540-412c-bacb-e5b7b26cbfcf.filesusr.com/ugd/95bb70_18820d97f090484c901fec93a5643a8b.pdf?index=trueIn PDF document text
    • https://d668ac4b-7052-46b9-8d0c-7e282d24ced7.filesusr.com/ugd/00fc84_55f81254da6846329ebffa3df15e4742.pdf?index=trueIn PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0A9 5144 bytes
SHA-256: 98c9cecaf9a8586f6bc8c49b7831e247d3cece6337017a613d40f5b59607a345
font_01_sfnt_off0000e1f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1F3 11888 bytes
SHA-256: 6c31ae7a51e55baec6bb3f87561ddad7e01b626892d544187fe25ede5b88d77a