Malicious PDF — malware analysis report

Static analysis result for SHA-256 f89095f85a4a400e…

MALICIOUS

PDF

73.8 KB Created: 2021-02-13 17:48:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 23222ed2f96b91106907e779726481c8 SHA-1: 36bb109c3fa614430f0758050fcb1060902721a2 SHA-256: f89095f85a4a400e5f8d65129b70f78e0f5ee84601069b17a01174b6df6a2c78
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 0.9997

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://baarspo.ru/wix?keyword=norse+gods+neil+gaiman+pdf PDF link annotation
    • http://mists.space/university_physics_for_the_physicalnlkzx.pdfIn PDF document text
    • https://cdn.sqhk.co/dedikunakudu/jhhgc75/medesagusire.pdfIn PDF document text
    • http://reduslimer.website/181601434852jh4u.pdfIn PDF document text
    • https://piwomokoxik.weebly.com/uploads/1/3/5/3/135335333/mewexenedaz-bofoxajudux.pdfIn PDF document text
    • https://cdn.sqhk.co/dibidoretu/FSGhecu/charm_city_kings_netflix_trailer.pdfIn PDF document text
    • http://womans30planet.com/sociolinguistics_book_by_hudson9f6dz.pdfIn PDF document text
    • https://funefazadoma.weebly.com/uploads/1/3/4/6/134648765/fujalava.pdfIn PDF document text
    • http://storefromit.pro/76113302309nvsd8.pdfIn PDF document text
    • https://welusagosa.weebly.com/uploads/1/3/4/3/134355806/7671044.pdfIn PDF document text
    • https://femanutokit.weebly.com/uploads/1/3/3/9/133999532/da44bc6c.pdfIn PDF document text
    • https://raziliselew.weebly.com/uploads/1/3/2/6/132695443/zulivananeretegerem.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393208/normal_5fcfa40952070.pdfIn PDF document text
    • https://cdn.sqhk.co/tifesiwafo/pgi2Hnz/police_officer_jobs_in_florida_non_certified.pdfIn PDF document text
    • https://tariwina.weebly.com/uploads/1/3/0/7/130739483/8017468.pdfIn PDF document text
    • https://pamenusunawot.weebly.com/uploads/1/3/4/0/134041165/wubivemurakeri.pdfIn PDF document text
    • https://zogopovedizojux.weebly.com/uploads/1/3/1/4/131408172/2ed6460a53.pdfIn PDF document text
    • https://cdn.sqhk.co/lilaxikixo/iciiekA/space_shuttle_drawing_easy.pdfIn PDF document text
    • http://verenica.net/todeta5c18e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pebulibupa.rf.gd/jurnal_ampisilin.pdfIn PDF document text
    • http://ritanuwo.epizy.com/veronica_mars_season_3_episode_guide.pdfIn PDF document text
    • http://taxupot.rf.gd/wordscapes_answers_ravine_6.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_off0000e3c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3C5 5328 bytes
SHA-256: 4477af0d7283ecb2bb3635319ff12fb8deec308689be9b07ed3ca8ba218df7c8
font_01_sfnt_off0000f5d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5D9 10620 bytes
SHA-256: 5b58f87ecc9cd7769651cac4c49d47364fc5a2ab2e2258069abf57b9648af06d

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