Malicious PDF — malware analysis report

Static analysis result for SHA-256 126edbeae65f11af…

MALICIOUS

PDF

75.2 KB Created: 2021-06-12 21:56:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 27be2745bf4fdde189334711644e09ab SHA-1: 16efafa895f119b0f3e6d2be74984d2ae7a42c2f SHA-256: 126edbeae65f11af0aa982275a3baccb7cfb2ed852d0365c37ae10e893f93cc2
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9997

Heuristics 5

  • 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 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://jumiwimov.ru/123?utm_term=dunno+mac+miller+piano+sheet+music PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4481510/normal_602e2837658c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459636/normal_6057ceb7ab87f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467577/normal_6061a2d470070.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445544/normal_5fd6746e19933.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367621/normal_5ffbf5772d619.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c776464-ab84-4433-bf13-eeb98cebfce2/nuxiwofolon.pdfIn PDF document text
    • http://felinemumivu.pbworks.com/w/file/fetch/144813021/dmx_funeral_procession.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76294ae8-0064-4e38-ba32-61216dc49c0a/78769941844.pdfIn PDF document text
    • http://finebov.pbworks.com/f/how_to_add_money_to_turbo_prepaid_card.pdfIn PDF document text
    • http://zovafidat.pbworks.com/w/file/fetch/144912444/zutimidosiretebege.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da9a32cb-5f71-46ee-abfa-f7f09e27dc14/80770951113.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7097c662-0702-426a-9ca8-937f24dfcc0d/50162938915.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3189c00-65db-4535-b196-f86a640db730/xizaxeretefupovenamewo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0dd43f2a-4555-45bf-acc5-dbb4ec2de507/98840332330.pdfIn PDF document text
    • http://gupiguna.pbworks.com/w/file/fetch/144584940/83339787558.pdfIn PDF document text
    • http://rasovuxosew.pbworks.com/w/file/fetch/144555639/idi_malayalam_movie_free_download_720p_hd.pdfIn PDF document text
    • http://kakexigodelo.pbworks.com/f/what_does_the_zero_product_property_day.pdfIn PDF document text
    • http://zuvuzut.pbworks.com/w/file/fetch/144549501/winchester_model_62_pump_22_rifle_for_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e06deaa2-9be1-4757-be76-6660f64b5fe3/verb_chart_with_marathi_meaning.pdfIn PDF document text
    • http://dajodovilav.pbworks.com/f/woxikesititazagozatunuwik.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e84d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE84D 5172 bytes
SHA-256: adc86253b710d1bf98e52e1d8f2d4dcaf14fa72d83c066df985cd609e3fa50e7
font_01_sfnt_off0000f9b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9B5 10548 bytes
SHA-256: f9a13b5442967088336a8d53cf651eb9db50a69befb8b8bed379435dc1a99c50

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