Malicious PDF — malware analysis report

Static analysis result for SHA-256 60296c049f267ecc…

MALICIOUS

PDF

80.0 KB Created: 2021-05-27 10:07:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 6b446ce3cf97b9d696c85c14f980476b SHA-1: cf84a08f2a55c6c50d77ed169341c8341d2a0475 SHA-256: 60296c049f267eccce84823356eea9a91b6f98ca55fb30c2161bad32b3a110a3
186 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning model indicated a high probability of maliciousness. It contains a link farm with numerous external URLs, many hosted on disposable domains, suggesting a phishing or SEO abuse campaign. The embedded content, though heavily obfuscated, likely serves as a lure to these external sites.

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://nipisod.ru/strik?utm_term=what+food+is+high+in+fat+and+no+carbs PDF link annotation
    • https://bofuvuwowu.weebly.com/uploads/1/3/1/8/131856225/mewazozimikat-jusosi.pdfIn PDF document text
    • https://mitemulesebiped.weebly.com/uploads/1/3/4/4/134479511/626638.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392659/normal_5fffcdcca2357.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374976/normal_6068fa72401e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402486/normal_6057e49e175ae.pdfIn PDF document text
    • https://vogunuwar.weebly.com/uploads/1/3/4/8/134887333/bagilawaw.pdfIn PDF document text
    • https://parafobosa.weebly.com/uploads/1/3/1/8/131857791/c3e1df.pdfIn PDF document text
    • https://kedefakoriwo.weebly.com/uploads/1/3/1/1/131164231/xotawabugop.pdfIn PDF document text
    • https://xuratofojiwob.weebly.com/uploads/1/3/4/0/134096374/9409b.pdfIn PDF document text
    • https://lemurowivavaxub.weebly.com/uploads/1/3/4/4/134404776/691d04d452.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373241/normal_5fd8b089b080b.pdfIn PDF document text
    • https://masugofesobix.weebly.com/uploads/1/3/4/6/134656422/5293682.pdfIn PDF document text
    • https://guduzuzej.weebly.com/uploads/1/3/1/6/131606672/8400051cb4eea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412403/normal_603e378c1eb0d.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://uploads.strikinglycdn.com/files/e71bb2d3-a1f5-4f6b-ab9d-1daabaaf5e82/navajo_creation_story_fourth_world.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/284bfe02-27ba-43ca-a759-e29071cabf84/what_is_the_10th_house_in_astrology.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c7ed824-f309-4483-a3e7-1a78f6b43ac7/mabefop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9a8968c-c62e-4eff-b1e5-6216bd18a0ce/international_journal_for_numerical_methods_in_biomedical_engineering_review_time.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eee4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEE4 5076 bytes
SHA-256: a76957cd661dba27a93a7ab5158f2f2b2dd7e888db2f6ad04e62e96ea716ce87
font_01_sfnt_off00010021.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10021 10668 bytes
SHA-256: 27e4906be178947ca753fee199b1ebbbddd5f6d8bdbbe2d697a37802424e77b8
font_02_sfnt_off00012461.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12461 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3