Malicious PDF — malware analysis report

Static analysis result for SHA-256 08d6063931420d99…

MALICIOUS

PDF

86.8 KB Created: 2021-01-30 21:42:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 0f88f05981e9a8629c37989eed7e77ab SHA-1: 99990c8b2669339167090f8d2a55b34de0134e7f SHA-256: 08d6063931420d99ed77222229344a421ea967e055eb2c93b7df697349de010d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of numerous embedded URLs, including one pointing to 'maypoin.ru', suggests a phishing or malware distribution scheme. The PDF also contains link farm characteristics, further supporting its use as a lure.

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://maypoin.ru/123?utm_term=collectivist+culture+definition+psychology PDF link annotation
    • http://yewes.fun/maze_escape_minecraft_level_19jccp.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499021/normal_5feb96069f3bc.pdfIn PDF document text
    • https://vokubopupabilu.weebly.com/uploads/1/3/4/6/134691430/5722124.pdfIn PDF document text
    • http://verifiedbadge-lnstagram.com/nanesr7bt3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471484/normal_5fd1762b6fa51.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378175/normal_5fdc0bccc7636.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392871/normal_600012bb7e91c.pdfIn PDF document text
    • https://xinuluparos.weebly.com/uploads/1/3/0/9/130969110/tafixuxukuza-zudamazi-kotuzaxewep-lafir.pdfIn PDF document text
    • http://idealica-uficialeitalia.website/858490920854ee66.pdfIn PDF document text
    • https://pulapiselipatux.weebly.com/uploads/1/3/1/3/131378970/kerusagoluloxuwaseg.pdfIn PDF document text
    • https://lemorixumo.weebly.com/uploads/1/3/4/7/134748879/570f4674ae0e4.pdfIn PDF document text
    • http://ibkreactiva2020.com/getty_images_contributor_sign_upm0nru.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/waxegatulo/b_arch_question_paper.pdfIn PDF document text
    • https://s3.amazonaws.com/ritoma/32905424006.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_off00011519.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11519 5276 bytes
SHA-256: 84f4a09cac82348377d4327d31dc3c9e9607b666c47790eaf8655bc4aa1006c0
font_01_sfnt_off00012713.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12713 12288 bytes
SHA-256: 23ab7317a2cc22fd72e2bb583195a6dfefddfd6ed434b8128a92265f6cc6f2fa

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