Malicious PDF — malware analysis report

Static analysis result for SHA-256 ced8d6cc0f204935…

MALICIOUS

PDF

73.5 KB Created: 2020-11-14 17:41:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: c67b351ef62795d8c5154d642a226748 SHA-1: 1731a625b6f1e7bc0dd97f380ff795bd1b3ae364 SHA-256: ced8d6cc0f2049355b5495628b33210f3d09da7444b52287f7e2ec9efe3ea135
156 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is part of a link farm and hosts external URIs, with one URL pointing to a suspicious domain. ClamAV detection and ML classification strongly suggest malicious intent, likely phishing or malware distribution. The document body, though heavily obfuscated, contains text related to a search query, reinforcing the phishing lure.

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://trafffe.ru/123?utm_term=dmv+wayne+nj+phone+number PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366668/normal_5f87230e3a557.pdfIn PDF document text
    • https://jeponiruwapin.weebly.com/uploads/1/3/0/7/130776483/resimogapukizudel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415300/normal_5fa3dbe98eab4.pdfIn PDF document text
    • https://wovasemuzusalej.weebly.com/uploads/1/3/1/6/131636629/lebivolasuxav.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/17751a09-7706-4b53-a715-94761b3177c0/23886812112.pdfIn PDF document text
    • https://s3.amazonaws.com/wopari/35778654439.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22737b08-43d4-4105-a1cb-3121e62ebfd7/44156148846.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0639f95-b505-469e-a03d-97464ac69527/chestnut_hill_academy_philadelphia.pdfIn PDF document text
    • https://s3.amazonaws.com/fazujo/how_to_block_mortal_kombat_x.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35f22510-cf80-42d4-902a-885a2309b33f/kipana.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbc6351f-db0a-4fed-8274-d3758761163c/72582452543.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/105fe2e7-f155-4080-a06a-c2060ca09605/orville_gibson_mandolin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92210d9c-fe88-47a2-9730-3a8e5f0b1e52/gubig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/581aedcd-5dae-4281-9d0b-47d10aa1c4a5/38018577124.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23eca1fb-abe2-42ab-bf81-3e9732d56ea6/autopsy_report_sample.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_off0000e244.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE244 5320 bytes
SHA-256: 497e92e461ba81cd8391ff4b040128f4b4801f25eccdae80839adb09202af1d2
font_01_sfnt_off0000f44c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF44C 10844 bytes
SHA-256: 0c0f9cef40b98cb0d17a11c094c4a9e9e02aa4df9b788a0cf00144f6def3588b

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