Malicious PDF — malware analysis report

Static analysis result for SHA-256 35e033cbdca56837…

MALICIOUS

PDF

81.3 KB Created: 2020-12-26 11:44:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: b7dcc40e431171272222fc469eb96f9e SHA-1: d14b252646215d9b18cfb510a6b69ca8da74cffb SHA-256: 35e033cbdca568379f1f1d787d4addd5f24ae996410394e836685ef0df837154
156 Risk Score

Malware Insights

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

The PDF contains a heuristic indicating a link farm and an embedded URI pointing to 'traffset.ru'. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or malware distribution attempt, likely using a social engineering lure related to the 'Zombieland 2' movie title.

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://traffset.ru/strik?utm_term=zombieland+2+madison+allergic+reaction PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4410217/normal_5f96d340a3c8b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465006/normal_5fd7c99752dfa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404987/normal_5f99e5360c861.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367944/normal_5fbbf9979815e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502464/normal_5fb6f2a57ad77.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456996/normal_5fa4e6db7f070.pdfIn PDF document text
    • https://gidixelasulam.weebly.com/uploads/1/3/0/7/130739099/jodajikafewaberuxa.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/7f05be2b-c445-4160-a209-185e00003e04/fsx_tutorial_deutsch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6af31bfb-8619-40cd-b2e6-12afe460c1d9/nominaxonasog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e46b6e2a-3c25-4718-9c75-3744bc72f042/dior_lip_gloss_685_fancy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/910fa537-f78d-4fb2-bb21-e466585b27cd/50593264322.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68268bf8-062c-4773-83cc-da33c5df7ff6/onlinemeded_intern_guide_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe34ebf8-7ee2-4806-8b74-b94e3d6d8aac/vegiximesopibamomuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbe0cced-6cbc-4868-821a-eb6d83a1599d/fuwiwivazani.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dad67433-c37d-461a-9872-5fe62669d3c1/distinguer_droite_et_segment_ce1.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_off0000febe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEBE 5488 bytes
SHA-256: 0c1be97e998aded8781f33c790d2124a14cce8ccc1ff269c2e5e3bc45f5db1d7
font_01_sfnt_off00011151.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11151 11356 bytes
SHA-256: 79ec658d1388d1f982eec9bc01faf65255c83c07f4603ed30a558735adb26d58

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