Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f0fd7c3e2fabdc0…

MALICIOUS

PDF

81.4 KB Created: 2021-06-03 01:53:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: de16670418e223e693487acf7092e382 SHA-1: 73b0cd8301b4b93521aed4c3c40e3cdcca04753d SHA-256: 5f0fd7c3e2fabdc0b41e20c8fa214e097434ec0e8f93eff7ff2a9d9587a11951
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9954

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
  • 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://inwebjor.ru/pbw?utm_term=street+fighter+4+hd+apk+%252B+data+for+android+%2528offline%2529 PDF link annotation
    • https://tukusalo.weebly.com/uploads/1/3/0/9/130969921/8560082.pdfIn PDF document text
    • https://vebipebetas.weebly.com/uploads/1/3/4/0/134012388/8664432.pdfIn PDF document text
    • https://tagipuzato.weebly.com/uploads/1/3/0/7/130776724/jerorar.pdfIn PDF document text
    • https://soputepitup.weebly.com/uploads/1/3/5/9/135973261/44988ef.pdfIn PDF document text
    • https://zomatofaso.weebly.com/uploads/1/3/4/6/134633851/suzejijovipufisobe.pdfIn PDF document text
    • https://mipejefote.weebly.com/uploads/1/3/4/3/134356111/zadinuxoderok.pdfIn PDF document text
    • https://jupikojeba.weebly.com/uploads/1/3/0/9/130968920/birakasev_wipeg_wimoxuzigexexo_vofixiru.pdfIn PDF document text
    • https://putigazabikikim.weebly.com/uploads/1/3/2/6/132682718/96798392eb.pdfIn PDF document text
    • https://kadogejajufa.weebly.com/uploads/1/3/4/7/134717900/56803a.pdfIn PDF document text
    • https://munerojepoges.weebly.com/uploads/1/3/4/0/134042508/kokabagipidemuvabo.pdfIn PDF document text
    • https://vupafoteb.weebly.com/uploads/1/3/7/5/137509526/voripejuzafuv.pdfIn PDF document text
    • https://wapudonobisu.weebly.com/uploads/1/3/7/5/137512630/2524208.pdfIn PDF document text
    • https://nokifijipuf.weebly.com/uploads/1/3/4/3/134305843/pujopedojixazifowur.pdfIn PDF document text
    • https://duzobiwaroliwu.weebly.com/uploads/1/3/2/6/132696147/e64490b9a9.pdfIn PDF document text
    • https://wijowapozibam.weebly.com/uploads/1/3/5/3/135329999/8472103.pdfIn PDF document text
    • https://zawanudodulir.weebly.com/uploads/1/3/1/4/131452903/lenefeg.pdfIn PDF document text
    • https://vimanofadubob.weebly.com/uploads/1/3/5/3/135304206/5227008.pdfIn PDF document text
    • https://ziwivebagojub.weebly.com/uploads/1/3/1/8/131871618/3891818.pdfIn PDF document text
    • https://telutowi.weebly.com/uploads/1/3/4/9/134904764/magujutudokav.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://sisagexal.pbworks.com/w/file/fetch/144504966/sizikopinabowuzokijex.pdfIn PDF document text
    • http://sejuworepow.pbworks.com/f/how_to_get_my_w2_from_former_employer_online.pdfIn PDF document text
    • http://vananizi.pbworks.com/w/file/fetch/144521781/phim_hn_quc_tnh_yu_c_tr.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be37b3ea-e66b-42c0-9928-53df25dc2a4a/84264608768.pdfIn PDF document text
    • http://kepojijudiva.pbworks.com/w/file/fetch/144521460/vafuzanugamupugado.pdfIn PDF document text
    • http://lakebimutep.pbworks.com/f/37378335532.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1d397ee-e513-44c6-9fe7-7bcde9687bf3/what_should_pta_funds_be_used_for.pdfIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f087.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF087 5324 bytes
SHA-256: 29a9f14b83a43baa3bd0fbf6dfb5ff2866bbfe659dc940735bd89dd844efd6b4
font_01_sfnt_off000102a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102A5 11880 bytes
SHA-256: 04bf8dd70e915ac364100c153eac24296c8f98e06abdfaea4d438f211cc266aa
font_02_sfnt_off000129a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129A7 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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