Malicious PDF — malware analysis report

Static analysis result for SHA-256 23db04833f5e2c08…

MALICIOUS

PDF

81.0 KB Created: 2021-05-13 01:15:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: b455f73a78b58e9218cad8adc981ee2a SHA-1: 657ee385e85a02cd3ebe7b847ce0e1c4c7ebb9a7 SHA-256: 23db04833f5e2c08b6ff53fa1ce9c78a4522f4748424382d6c365f8745e344ca
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to distribute malicious content or phish users. The document body, though heavily obfuscated, appears to be a lure related to a game guide, which is a common tactic for social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://druttle.ru/strik?utm_term=horizon+zero+dawn+weapons+and+armor+guide PDF link annotation
    • https://jikevumuvovidu.weebly.com/uploads/1/3/4/3/134324483/binek-zuseneriji-fituxoxonatek-wudelipem.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428062/normal_5fe728817e9c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501046/normal_5fd6625341ede.pdfIn PDF document text
    • https://fuxarudoniw.weebly.com/uploads/1/3/5/3/135350341/50024e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374545/normal_602e5f66ad348.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390095/normal_5fd1d095d1cf3.pdfIn PDF document text
    • https://geguwuwivoloko.weebly.com/uploads/1/3/1/6/131636947/8960449.pdfIn PDF document text
    • https://gejowarog.weebly.com/uploads/1/3/2/7/132740172/zetisizatudij.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://9e730ba1-499c-413e-9a09-8a81f8121270.filesusr.com/ugd/0a0016_84b7f340bc0740059e4e6026b8c92fb3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fexuror/relationship_manager_resume_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/891ab83f-f349-404b-adb6-8347f70d59a8/how_do_you_know_if_a_guy_is_genuinely_interested.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/369b42ac-c22a-4786-8ae6-cf9da671cd68/67913869233.pdfIn PDF document text
    • https://fea67d75-dd3b-4bdd-af05-748e92ec8a52.filesusr.com/ugd/05900a_ef6e5a92c78c481486720149c842cbbe.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a299a2ca-a580-4d2e-8bea-3f22510def24/xunuj.pdfIn PDF document text
    • https://64e1471b-64f8-4582-b127-b1692805dd1b.filesusr.com/ugd/507a3d_41f72ce5445244bc95b698fc087c4acb.pdf?index=trueIn PDF document text
    • https://f4a80ce2-0a24-44e2-aff7-13c87a434ee9.filesusr.com/ugd/ace063_b8438c5113f44022b9e54593f531ba7c.pdf?index=trueIn PDF document text
    • https://183cab0c-2e2b-44e6-b55a-0f82cb58e578.filesusr.com/ugd/133137_5c026ffb4eca4be3878d8ff707948152.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kibavutibeved/77185118091.pdfIn PDF document text
    • https://0f3c41ac-de96-4ba7-a517-026d7435d592.filesusr.com/ugd/8631de_681185f36068477d8027e850766e27ea.pdf?index=trueIn PDF document text
    • https://43a2ba88-5de9-465b-b95f-6a4d82f2d06e.filesusr.com/ugd/dcbeda_8e21ad0e1922421f9098577af366af30.pdf?index=trueIn PDF document text
    • https://e8dc5420-792a-4861-90db-09cfc8d8a7d1.filesusr.com/ugd/1378f5_d65ec509c77045d2b55892987808b0c1.pdf?index=trueIn PDF document text
    • https://9d03b195-5c34-4993-8a23-519dd2bddccd.filesusr.com/ugd/9ac058_c998f187a0db457fb1cf0717a247f075.pdf?index=trueIn PDF document text
    • https://ff5d1526-1eb9-447d-8915-67ca9933f1b4.filesusr.com/ugd/9565fd_6ce7d1f09a264505b579f1c7fab47f85.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2EC 5152 bytes
SHA-256: d72bf37343a34cdb5beec2f8a1a03dcf70aad8d04c5e050dc8ab5d7c814639a9
font_01_sfnt_off00010464.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10464 10440 bytes
SHA-256: 8ed3a6322d8886821323fdbfbb13340934e8fe67c1e0e3ab00c2e83a1cfbf343
font_02_sfnt_off0001283f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1283F 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

Open this report in the interactive analyzer, or submit your own file for analysis.