Malicious PDF — malware analysis report

Static analysis result for SHA-256 81eebd08a2cc5297…

MALICIOUS

PDF

73.6 KB Created: 2021-03-24 19:24:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 71c73fff55e208ef2b895d113002b64a SHA-1: 5a4fd88299c9272a82cdede45931b9428d70b2d1 SHA-256: 81eebd08a2cc52978382a463a60f63f50c9247d482f2f5ec4d42bb895c804e20
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 0.9998

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://soxebez.ru/strik?utm_term=white+tiger+animal+habitat PDF link annotation
    • https://cdn.sqhk.co/nuleneru/ibqXXge/najugiredekilali.pdfIn PDF document text
    • https://kesesitevon.weebly.com/uploads/1/3/5/3/135317357/ferawuxe.pdfIn PDF document text
    • https://cdn.sqhk.co/tedubifo/1jfhdic/senior_pic_captions_for_instagram_2020.pdfIn PDF document text
    • https://suletakawuzumab.weebly.com/uploads/1/3/5/3/135348492/4719241.pdfIn PDF document text
    • https://xofivexaroza.weebly.com/uploads/1/3/4/3/134321457/77926c0aef8.pdfIn PDF document text
    • https://cdn.sqhk.co/sujubowip/du4gfzE/zanevoj.pdfIn PDF document text
    • https://cdn.sqhk.co/sarowojep/hijfjhw/48789012504.pdfIn PDF document text
    • https://pikezusepi.weebly.com/uploads/1/3/2/7/132740337/vosenizogebilej.pdfIn PDF document text
    • https://tekagegi.weebly.com/uploads/1/3/2/7/132740997/wamuxijiv.pdfIn PDF document text
    • https://cdn.sqhk.co/sojuzafu/hajghfy/vavobekebulijugu.pdfIn PDF document text
    • https://cdn.sqhk.co/bajafigotuvi/U3gHhbM/1339116200.pdfIn PDF document text
    • https://cdn.sqhk.co/javomekoru/jdjd2gc/trailer_hitch_snow_plow_craigslist.pdfIn PDF document text
    • https://suzixibaru.weebly.com/uploads/1/3/4/7/134709676/zurimawivoxafewuf.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/f3e5c660-44a8-45e0-ba62-e7c2bb09859f/30831672845.pdfIn PDF document text
    • https://6376acfe-5884-4251-b3d5-19a03c044549.filesusr.com/ugd/de3d83_9cec474ee01c4500b3f93c51b35d9659.pdf?index=trueIn PDF document text
    • https://42e65457-ec34-4553-8979-78b6e302f774.filesusr.com/ugd/f1976d_44fcef80fe754a689fad2cf8882fc9cf.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f74944ad-d2fd-4c7d-beac-850274b4f772/gezineta.pdfIn PDF document text
    • https://6acf0ca1-aa41-4771-8b91-54baff69ee7f.filesusr.com/ugd/7d1dc9_ca43ce8af442467aa648be5902b87d08.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_off0000e5a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5A6 5072 bytes
SHA-256: 45a897d4a84c4b2d7f41bd63308de1d4e1e30da13bd0fda69dd0f0a91027a759
font_01_sfnt_off0000f6d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6D0 10168 bytes
SHA-256: 1888234b65da3cfd5735bb06df38e7f53ad8a4714ab8f8484603f22e2f11f451

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