Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cbcf35cbdc6b573…

MALICIOUS

PDF

65.9 KB Created: 2020-11-24 09:03:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: ec36750a2626f5053f2152ddc37c961d SHA-1: 42a1a248ddcf7822691084fafcedbc4ed02e5d21 SHA-256: 2cbcf35cbdc6b573f5fc437c3717474a56c905a3443f66823718cc6b5cbab17d
214 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, with one identified as a known malicious redirector. The heuristic firings indicate this PDF is designed to redirect users to malicious infrastructure, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest malicious intent.

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://ggtraff.ru/strik?utm_term=freight+forwarding+training+manual+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4421042/normal_5f96982996fcc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414695/normal_5f962b57340b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405895/normal_5fa4623345064.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448094/normal_5f9fbe043a460.pdfIn PDF document text
    • https://lozugukavokukes.weebly.com/uploads/1/3/4/3/134357100/detakupebo.pdfIn PDF document text
    • https://daletutanedura.weebly.com/uploads/1/3/1/6/131636587/4466841.pdfIn PDF document text
    • https://sajosapisede.weebly.com/uploads/1/3/4/3/134344890/puvab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413238/normal_5f97d14935a8f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453730/normal_5fb2cd0228687.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373768/normal_5f98812e3f229.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425224/normal_5f9d45042e3c3.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/2c226055-0f17-435d-939f-d02850f51d89/polarity_test_of_3_phase_induction_motor.pdfIn PDF document text
    • https://s3.amazonaws.com/lodazojamuva/folinobuv.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_off0000c623.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC623 5324 bytes
SHA-256: b468769818aaf8518655d0c9e8efc46ed588d78e655fb814ae15648d5cee05aa
font_01_sfnt_off0000d82f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD82F 10140 bytes
SHA-256: ab8d0ee962092c4971d522320dd3ba4d7963fedb76d3cfe7d4cbd03b80c2b99c

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