Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe60b20b0e54ce1a…

MALICIOUS

PDF

81.7 KB Created: 2021-04-20 23:51:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: b5c5b27802c2121b7ea189b9ff4ab461 SHA-1: 1e5b5e6a5447b52e80c5dbaee095862ec7063459 SHA-256: fe60b20b0e54ce1afac9e0f6aedad684591b4022b8ee770905acfb9a622452a6
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 0.9998

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://resalured.ru/strik?utm_term=best+food+plan+for+lean+muscle PDF link annotation
    • https://cdn.sqhk.co/liregagibago/cghj0Nj/day_r_premium.pdfIn PDF document text
    • https://cdn.sqhk.co/fenazijeguk/2jcQchf/92633380821.pdfIn PDF document text
    • http://vekisonoloze.sportsontheweb.net/vobirifubadovuxuwosegenax.pdfIn PDF document text
    • http://sifinujox.sportsontheweb.net/forklift_certification_template.pdfIn PDF document text
    • https://cdn.sqhk.co/givogaduta/ejibiaW/baxoxigulolovises.pdfIn PDF document text
    • https://cdn.sqhk.co/jupujezaxa/xjfhhii/sas_urban_survival_apk.pdfIn PDF document text
    • http://copyrights-notices-helps.com/fufesetemowawirajemoxjeeai.pdfIn PDF document text
    • https://cdn.sqhk.co/narulaloro/Tavcr4r/48224413929.pdfIn PDF document text
    • http://begetus11ppz.xyz/52166577290s9p2r.pdfIn PDF document text
    • http://exemplpusj.com/17528385837ztmzi.pdfIn PDF document text
    • https://cdn.sqhk.co/tifomogoketu/fUNijis/south_africa_hit_songs_2018.pdfIn PDF document text
    • https://cdn.sqhk.co/lukisebeka/Zhha5ha/4576914103.pdfIn PDF document text
    • https://cdn.sqhk.co/zuronenom/jjlb5je/lasirelumiwakopibuz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://7ef7ebf0-bcb0-4ca2-8538-5a19c3e9f01c.filesusr.com/ugd/aff7ca_1445d10d82954e1fb6b6631d211791fc.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1828a26a-b087-47c6-83ed-78e8b46db559/garenukagixajoz.pdfIn PDF document text
    • https://920f4c01-5fd6-4c40-8b27-b99972fecb60.filesusr.com/ugd/d63aaf_91f71ad6d871407bac17db44901b1f3a.pdf?index=trueIn PDF document text
    • https://88966db1-4a83-4446-b941-f65022a6235f.filesusr.com/ugd/928e0f_3dd4fd1a352c4b84ba8bceb28c68ee11.pdf?index=trueIn PDF document text
    • https://4779f2f8-a33e-4327-9c78-21ee0bcf4620.filesusr.com/ugd/31bf02_703cf73b79fb4000ab8ee2482936d728.pdf?index=trueIn PDF document text
    • https://2ea9429b-0332-4ee6-bb75-ab9535b56c99.filesusr.com/ugd/e2f7e1_2e1b602c325c4ef499b04e3fe3778681.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5206a2ba-c34b-437b-9bec-ecb013e0f4b9/why_does_my_samsung_washer_smell_like_rotten_eggs.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_off000104c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104C5 5348 bytes
SHA-256: e33d4329e96f7ea111ea09e28cd63b66976ae178220ebc9730864faee9041603
font_01_sfnt_off000116e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116E0 10196 bytes
SHA-256: b80884b8ea3e89635d50917e156a1b32be4d5827d7c77322e843558372df9951

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