Malicious PDF — malware analysis report

Static analysis result for SHA-256 2881a241313eaca5…

MALICIOUS

PDF

77.0 KB Created: 2020-11-10 12:04:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 933c08df94ffdda8c7467c37bc899cb2 SHA-1: b61bb13f2da5ac097ee1ebcd457537adab8a3684 SHA-256: 2881a241313eaca545cf6adc8d5e3b4a63c97ff20a8e10c9cd041047b8a2e2af
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, with the primary malicious URL being trafficked.ru. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically related to phishing. While no scripts were directly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution.

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 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?keyword=canton+town+club+function+hall PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4393511/normal_5fa4400dd8ac9.pdfIn PDF document text
    • https://babikovinemixe.weebly.com/uploads/1/3/1/8/131856339/fazijopaf.pdfIn PDF document text
    • https://firizuvamo.weebly.com/uploads/1/3/4/6/134618899/831101bfe95cda.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/664712fa-dc44-40f6-b628-a54717f332c7/ap_human_geography_massively_gigantic_review_packet_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d00b63d1-7e8a-431f-b1a1-764d34f57fa2/99618224507.pdfIn PDF document text
    • https://s3.amazonaws.com/kakef/32713363475.pdfIn PDF document text
    • https://s3.amazonaws.com/rimepusox/coleman_instant_tent_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29a04024-cde3-409f-a2e1-30a4a3623e76/tipodi.pdfIn PDF document text
    • https://s3.amazonaws.com/vufuzewasi/expedia.com_flights_on_tap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d904356-2142-410f-9941-e559de7da4d1/mooded_xbox_360.pdfIn PDF document text
    • https://s3.amazonaws.com/rotowan/jubuzekopozemilasufobi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a63ec2c9-8880-41a5-a0c4-b36c0a95c74a/9760948923.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96a3374b-f70a-4727-9708-1001a4a52a80/chimney_hill_estates_farmington_ct_address.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_off0000f00d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF00D 4832 bytes
SHA-256: 47f82242e55dac490a987fe22734d5f3541e0485db1aa9de1285b2a5e2fb102b
font_01_sfnt_off00010094.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10094 11348 bytes
SHA-256: b69171670774bf86e549deb44ee460eadffddffdbb5869757c9edff8a9055790

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