Malicious PDF — malware analysis report

Static analysis result for SHA-256 1022f0494a1f0fcb…

MALICIOUS

PDF

71.1 KB Created: 2020-12-28 14:52:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: eb5087dd435794e074ed1f5044ce23c9 SHA-1: bf8e97cd98d85524dc485fc2f1e66fffe5c66510 SHA-256: 1022f0494a1f0fcb7c35c010e51670c2e155d022b4e836265ba12fba8d3f735b
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are part of a link farm, suggesting a phishing or scam attempt. The ClamAV detection and ML classifier also indicate maliciousness. While no scripts were directly extracted, the PDF structure and embedded URIs point towards a malicious intent to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • 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://trafftec.ru/strik?utm_term=rotator+cuff+tendinitis+and+tears PDF link annotation
    • https://cdn.sqhk.co/tovisegag/VBiFezS/mixugobotonixotovex.pdfIn PDF document text
    • https://cdn.sqhk.co/jagakutojut/Ojfl0hg/goofy_cowboy_names.pdfIn PDF document text
    • https://cdn.sqhk.co/fuzomorikat/iiczjjj/sheltered_part_or_side_crossword_clue_3_letters.pdfIn PDF document text
    • https://cdn.sqhk.co/worupageke/Up1cWNx/bbq_pork_ribs_near_me.pdfIn PDF document text
    • https://senobatupubem.weebly.com/uploads/1/3/1/4/131437889/jonekeganije_kaguraxepezorab.pdfIn PDF document text
    • https://jexedijelewa.weebly.com/uploads/1/3/4/5/134518212/fe798f2e.pdfIn PDF document text
    • https://cdn.sqhk.co/kitaparek/SyhfBge/sniper_full_movie_2016.pdfIn PDF document text
    • https://jivexine.weebly.com/uploads/1/3/1/3/131380908/096487c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a3e0c2d-9dd0-4e37-8d50-bd3a74096b3f/44332161101.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c15a68c1-82fe-41d5-975b-e9d7831a57bf/tiny_heist_hacked_unblocked.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4503198f-1da9-41b4-be0a-b267baee0da2/algebra_1_california_textbook_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/kitakilesa/zanefupakikixap.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_off0000db0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB0A 4992 bytes
SHA-256: 834ea3a9b956c957b3066fb6c32a0f85c7c8af90082cb0bc97d7b4cc859a067b
font_01_sfnt_off0000ec15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC15 10472 bytes
SHA-256: efa52f6007c7296e34329ff9b4d75c3baaeb8451c01599fa48593e5b583cffcf

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