Malicious PDF — malware analysis report

Static analysis result for SHA-256 910bc8e839f084e0…

MALICIOUS

PDF

130.2 KB Created: 2020-11-13 06:32:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 665c8843b2dd255e0d37ad2a54280de0 SHA-1: 1ca1a3691e19ecebb27e2fd740e817d7440d6e0a SHA-256: 910bc8e839f084e00bfb3767334d539f036eb3540344943311f2877fb75669a3
214 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier, including detections for malicious redirector links and a link farm. The embedded URLs, such as 'https://gettraff.ru/strik?utm_term=warhammer+total+war+2+lizardmen+campaign+guide', suggest an attempt to redirect users to potentially harmful content. The presence of numerous links points towards a phishing or malware distribution scheme.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/strik?utm_term=warhammer+total+war+2+lizardmen+campaign+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366623/normal_5f896d455d548.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366319/normal_5f9a6a8e961d4.pdfIn PDF document text
    • https://putigazabikikim.weebly.com/uploads/1/3/2/6/132682718/4c7af57c7d5b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443356/normal_5fa5db9de7238.pdfIn PDF document text
    • https://gasodugolulo.weebly.com/uploads/1/3/4/3/134375537/bawega-vuxefepedajuwa-gevitumulo.pdfIn PDF document text
    • https://rulomegujenuguv.weebly.com/uploads/1/3/4/3/134329868/2698682.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419002/normal_5fac46c0a8a8a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475730/normal_5fadf3d55731f.pdfIn PDF document text
    • https://tivakoxidedopa.weebly.com/uploads/1/3/0/7/130776298/lisekiretonokur.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://s3.amazonaws.com/zebarufuridorur/36223648195.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9c8d0bc-8996-4584-96dc-29d501bb10c7/wubat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e70fa772-c914-4283-8ede-d0e603d3933d/trig_problem_solving_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/eve_online_carrier_ratting_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7afe6e61-39eb-4d30-933a-a66b17670ff7/vafutul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0853f961-0989-463b-8a50-4a30c18ffe12/piwupatedajunadeximaniro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f5cc848-6850-413b-b5bc-8468c8c2ed6b/bapisaridojatadafep.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_off0001b77d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B77D 5476 bytes
SHA-256: de74ddceb37ed20cfa2d36d31f19399f46bcdf42455b409cd6183fbbce910c68
font_01_sfnt_off0001ca16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CA16 10260 bytes
SHA-256: 0024f887ea2195f88f1a66f0948fa947343200b1f2d3b8a67d4db205838443a7
font_02_sfnt_off0001ed15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1ED15 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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