Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee7b94dadb03fcfc…

MALICIOUS

PDF

73.1 KB Created: 2021-05-31 21:53:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e50254271ca4ee6f16510639db34b588 SHA-1: 5a384f79e4262ac43ad563fda9577c7a7c50dc2f SHA-256: ee7b94dadb03fcfc4f87559411ca9eec669a7383b52bef343644740e1885fdf5
194 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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://pistant.ru/pbw?utm_term=bully+anniversary+apk+data+200mb PDF link annotation
    • https://rabugotekinevod.weebly.com/uploads/1/3/1/8/131871666/pidek.pdfIn PDF document text
    • https://lenapejasuma.weebly.com/uploads/1/3/4/7/134749539/sebiwomo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471509/normal_606560214176c.pdfIn PDF document text
    • https://zanokelalugabu.weebly.com/uploads/1/3/5/3/135315143/2621436.pdfIn PDF document text
    • https://nuluvefum.weebly.com/uploads/1/3/3/9/133999802/toxubij_rinurubaxigafeb.pdfIn PDF document text
    • https://nasotatuji.weebly.com/uploads/1/3/4/3/134392375/1d156df.pdfIn PDF document text
    • https://pofogixalozog.weebly.com/uploads/1/3/5/3/135346485/5658695.pdfIn PDF document text
    • https://gimazujik.weebly.com/uploads/1/3/4/2/134235519/4970614.pdfIn PDF document text
    • https://bakijowo.weebly.com/uploads/1/3/4/7/134726649/rufonib.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421614/normal_606521594ae38.pdfIn PDF document text
    • https://zobatovegu.weebly.com/uploads/1/3/0/8/130873738/f555321c065e.pdfIn PDF document text
    • https://nibapexi.weebly.com/uploads/1/3/0/9/130969889/7a060555.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490364/normal_603113c90c08b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://siwuromo.pbworks.com/w/file/fetch/144424731/61667316542.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14b9473d-29a6-4ff3-bf0e-812be7f9258c/76022061690.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bb30dc1-43c4-44df-8888-6c962e48b4bc/personajes_mas_importantes_de_la_independencia_de_mexico_y_lo_que_hicieron.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5eae0771-fd2d-4b54-a238-85b25d2e7a07/didujazakafifixujuwusiza.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_off0000df85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF85 5792 bytes
SHA-256: b48d7b3a48c26b83e4e73d6829ae85b7c2bd88dc7fcf4c2cf7f7c30e1c4c4caa
font_01_sfnt_off0000f333.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF333 10164 bytes
SHA-256: 7271eeb60c59cdd3612e2fec8c541e27b6189903b875962da0d05799d5b7845c

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