Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9831e9fb569fb7f…

MALICIOUS

PDF

72.7 KB Created: 2020-12-19 08:59:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: af93091305903dbbe794252353ad2dba SHA-1: c7e722fe23df1c123dca86626cbeaf34c4432995 SHA-256: b9831e9fb569fb7f1ea9fe8d192013a5c1aa53bf48741454e56428580ab66a98
156 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is a phishing document and hosts a large number of external links, likely for SEO manipulation or to distribute malware. The embedded URL 'https://traffnew.ru/strik?utm_term=adjustable+folding+table+legs+home+depot' suggests a phishing lure related to product searches. ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious classification.

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://traffnew.ru/strik?utm_term=adjustable+folding+table+legs+home+depot PDF link annotation
    • https://namokokesovu.weebly.com/uploads/1/3/4/4/134480524/92c3332.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365627/normal_5f870003dabc3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411480/normal_5fb85ea91a48d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449009/normal_5fabaec40cb9d.pdfIn PDF document text
    • https://tilobumofiraji.weebly.com/uploads/1/3/4/4/134492377/juwutojevixoz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415782/normal_5f9ec4c82a5d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388405/normal_5fdb5506b118c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://uploads.strikinglycdn.com/files/733645d2-8385-463e-9235-8cd71d7db9fb/xajozolelogoxuguxari.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4133ef4-00d8-4278-a4a0-00738e4c335c/kilumiwapefitepe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d45ef826-2836-478d-a995-fa212405b30d/sony_nex_5tl.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/127c8e6f-ccf6-475f-a275-57f552590eb3/new_balance_boys_sneakers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea16858d-eeae-47e8-9444-92200d385c31/92063789287.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3d47f8d-c07b-4673-833d-24e99afbd1b5/ap_calc_bc_2015_frq_5.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC88 5564 bytes
SHA-256: 2cafb42aa1b396453d6a2f0a46671ea638977291c4fd019f808f45cf051a56a0
font_01_sfnt_off0000df46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF46 6124 bytes
SHA-256: 406d9c14f76b4e0c27267bc63fa971fc1ebe99cb7b762b0c35436d2afb2f8dd6
font_02_sfnt_off0000ef2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF2F 11384 bytes
SHA-256: 2ea53204c460fda3a7a07c647177310d2ab888d46aa9cf26f6c335994d79952b

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