Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d0eb5d5eedd8ecd…

MALICIOUS

PDF

78.3 KB Created: 2020-12-21 08:55:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 223d938e736e30340bc8bb1210457a7d SHA-1: 108ee526a8a549a0236a4ab87e408f05397cd9f5 SHA-256: 9d0eb5d5eedd8ecded56d297c89be7f98815c56458aefb48a233d71693f9b73f
176 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical ClamAV detection and an ML classifier. The presence of a PDF link farm heuristic and an embedded URL suggests an attempt to direct users to malicious websites. The 'SE_CALLBACK_LURE' heuristic indicates a potential phishing or tech-support scam context, although the document body itself is heavily obfuscated and does not provide clear instructions. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://trafficel.ru/strik?utm_term=hot+rods+for+sale+in+houston+texas PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4450044/normal_5fd8d37726126.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425515/normal_5fa62de00df7a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459034/normal_5fa6a8a48394b.pdfIn PDF document text
    • https://sunivisoxeban.weebly.com/uploads/1/3/4/4/134493344/8854978.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/3808383.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365636/normal_5f87c67b2a78e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421787/normal_5fcf597a5e41b.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/zemigiduwagafu/lokojojediketo.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/gamosemukulo.pdfIn PDF document text
    • https://s3.amazonaws.com/nuruvapozixix/kaninirofoforinesop.pdfIn PDF document text
    • https://s3.amazonaws.com/zuponefi/video_cutter_for_android_mobile_free.pdfIn PDF document text
    • https://s3.amazonaws.com/widuxade/xevonudaluxemegigu.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/benzene_sds.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE21 5024 bytes
SHA-256: 32c7371fa07d73e94898ed7ac1bd3b8b77f6543921ef6113867a9bde4d790566
font_01_sfnt_off0000df25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF25 4000 bytes
SHA-256: 0784c2d2dcb9a07465f83cc261365bde5a06a48ef28f3679c2a2c1d167e879a8
font_02_sfnt_off0000ee53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE53 12052 bytes
SHA-256: ec41e48df493aa13157fbcbfd260d1b9a789399d87bd4e833ed356b87b0a7e36
font_03_sfnt_off00011698.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11698 16204 bytes
SHA-256: a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd

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