Malicious PDF — malware analysis report

Static analysis result for SHA-256 f25804a550e80463…

MALICIOUS

PDF

62.6 KB Created: 2021-02-13 04:37:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 84fd302b4273bfe30f763c955f141f3b SHA-1: 511d4c2c86876cf9dfb53729235b0684d165f8c5 SHA-256: f25804a550e804634df444bbee1ca76fb156eeff469413962a7fed351ab2b4d4
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document body, though heavily obfuscated, contains references to "nba 2k mobile hack no human verification", suggesting a phishing or scam lure. The numerous embedded URLs point to external resources, likely for downloading further malicious payloads or redirecting users to phishing sites.

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://seumenha.ru/wix?keyword=nba+2k+mobile+hack+no+human+verification PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4480585/normal_5ff44b3f8f52d.pdfIn PDF document text
    • http://itslm.fun/25811337579svj7h.pdfIn PDF document text
    • https://pukakiliratof.weebly.com/uploads/1/3/4/7/134768090/849a7addec0d7.pdfIn PDF document text
    • http://bestrongbyg.com/32382355112jd34l.pdfIn PDF document text
    • http://dalnoboyi.xyz/61794012123yex9r.pdfIn PDF document text
    • https://migawonakizize.weebly.com/uploads/1/3/1/6/131637147/5704334.pdfIn PDF document text
    • http://sarkife.site/tidurik34hak.pdfIn PDF document text
    • http://matroskin.space/55147624569h077m.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408463/normal_5ffb87d63ea31.pdfIn PDF document text
    • http://flash-sar.online/freebsd_for_windows7r1cn.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476421/normal_60041d54234b6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500186/normal_5ff2daca593aa.pdfIn PDF document text
    • https://tabodixab.weebly.com/uploads/1/3/4/5/134585887/wowuragigu.pdfIn PDF document text
    • http://svarka-aurora.online/94542302477k9bl4.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/makumapikeze/76066895378.pdfIn PDF document text
    • https://s3.amazonaws.com/fizaxo/49313089022.pdfIn PDF document text
    • https://s3.amazonaws.com/desekusoxi/cutest_cat_pictures.pdfIn PDF document text
    • https://s3.amazonaws.com/zibenoroduzuw/21707034951.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_off0000b8da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8DA 5308 bytes
SHA-256: e1fd687608eceee871f50061156c8d41c5ca27c61e789f625a64f8c8fcf305bd
font_01_sfnt_off0000cad5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAD5 10100 bytes
SHA-256: 5552fbd927c537b1bce20d04304aed235e77c720c62257849ffe4cc45f8f247d

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