Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa345474e67793dc…

MALICIOUS

PDF

73.5 KB Created: 2021-01-08 14:59:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 6d4b8a7f44177666846014a8112fc68b SHA-1: 77a0cde4fc53b96ec4bbbb62e46e534e4d99f3e2 SHA-256: fa345474e67793dc107f3010fe383388bf643ff299b500a0b5e5d8618455ed16
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to Weebly and other hosting services, suggesting a link farm or phishing operation. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. The embedded URLs are the primary indicators of compromise, directing users to potentially malicious content.

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/aws?utm_term=ausencia+de+cuerpo+calloso+pdf PDF link annotation
    • https://datugabow.weebly.com/uploads/1/3/4/7/134745554/jinoxepajebuf.pdfIn PDF document text
    • https://fozikubovofow.weebly.com/uploads/1/3/4/8/134897471/2043b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496816/normal_5fdbde82d9596.pdfIn PDF document text
    • https://ruzutemeba.weebly.com/uploads/1/3/2/6/132681300/7716199.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424029/normal_5fb73b08f0a16.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473049/normal_5fb6891803b3b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389361/normal_5fb9a40cd26f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444874/normal_5fbf2eb435853.pdfIn PDF document text
    • https://jasevumoxemu.weebly.com/uploads/1/3/4/7/134707335/1149325.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/kakekojezutok/58671521465.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fe9ceb6-d1c3-4f84-8e91-2eca92211cbc/74354541882.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f8f89f0-3d6f-4349-bb10-41df097dc709/how_many_bonds_can_oxygen_form_with_other_atoms.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d3ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3EA 4940 bytes
SHA-256: f6d7f12c667bf78b0d2a4dac75c1024264df79a32110ff644eab291039676e73
font_01_sfnt_off0000e4b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4B1 11408 bytes
SHA-256: a7503f7aacd230cd3f0f634d95c75f2e6aa42870dfa7cc067026b8f5d10b4d3a
font_02_sfnt_off000109cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109CB 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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