Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc02da569ee8c274…

MALICIOUS

PDF

64.5 KB Created: 2021-01-06 13:55:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: a0fa9327163f3bdba003c09025c72c21 SHA-1: e7bacfd59b76d6b4736951f4e71082ffea319f34 SHA-256: dc02da569ee8c27448d96a07f2d71d15028881548ffd845217b818f44f3e4500
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many hosted on disposable domains, indicating a link farm or phishing lure. The ClamAV detection and ML classifier strongly suggest malicious intent, specifically identified as Pdf.Phishing.Trojan. The embedded links are designed to redirect users to potentially malicious websites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://trafffe.ru/aws?utm_term=manual+caldera+junkers+cerapur+zwbc+25-+2c PDF link annotation
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/7360136.pdfIn PDF document text
    • https://gokipeko.weebly.com/uploads/1/3/4/3/134351508/94a62c863.pdfIn PDF document text
    • https://sigogaxeba.weebly.com/uploads/1/3/4/6/134620414/mixewamumowojesojono.pdfIn PDF document text
    • https://dezazobe.weebly.com/uploads/1/3/4/7/134755526/2179564.pdfIn PDF document text
    • https://tizijepen.weebly.com/uploads/1/3/4/2/134234944/papekito.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380380/normal_5fd7ebcecc08f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jezobasit/planet_coaster_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c400f03e-0fee-4674-8bd4-aa85f3f013b9/reddit_yang_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80eb77ef-6ba6-4360-8c04-319dc69204e9/united_hebrew_cemetery_inc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d22cb57d-0c6e-4c6d-b15c-29fb6ddc6ce7/the_paris_architect_audiobook.pdfIn PDF document text
    • https://s3.amazonaws.com/zobuwubedak/the_hollow_parents_guide.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_off0000be7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE7F 5780 bytes
SHA-256: a16bcd2f0989b1921359904514de7df9077ccd424db0ab69a097a5fdad271efe
font_01_sfnt_off0000d26e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD26E 10168 bytes
SHA-256: 66aad4b3d5d09bbd72811f53f06e6f0e1722535e26c9c69c87ba82a64760dc7f

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