Malicious PDF — malware analysis report

Static analysis result for SHA-256 05bcc57575f9a49b…

MALICIOUS

PDF

70.3 KB Created: 2020-12-19 23:04:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 36fa31fd3c031853f57ce03afffd7a52 SHA-1: d0f09c8c2a302ffddbf4eac6d1ba472c613ac092 SHA-256: 05bcc57575f9a49b0188c281b148c71d066ee6811ab589c6f92a9b633e8eb554
254 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' strongly suggests a phishing or fraud attempt. The presence of numerous external PDF links, including one pointing to a known malicious redirector, indicates a link farm designed to distribute malicious content or facilitate phishing. No scripts were extracted, but the document's structure and embedded links are indicative of a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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/aws?utm_term=auditing+attestation+cpa+pdf
    • https://cdn-cms.f-static.net/uploads/4373757/normal_5f8910fabb1c4.pdf
    • https://cdn-cms.f-static.net/uploads/4428035/normal_5f995abb5ab26.pdf
    • https://cdn-cms.f-static.net/uploads/4494140/normal_5fafd02c89db0.pdf
    • https://cdn-cms.f-static.net/uploads/4475389/normal_5fd15bbe7d0a1.pdf
    • https://cdn-cms.f-static.net/uploads/4386849/normal_5f8fd6cd9d512.pdf
    • https://cdn-cms.f-static.net/uploads/4471474/normal_5fda96c2ecb83.pdf
    • https://rugurujumififez.weebly.com/uploads/1/3/1/3/131384765/3945403.pdf
    • https://cdn-cms.f-static.net/uploads/4376125/normal_5fa0b504a3f8b.pdf
    • https://cdn-cms.f-static.net/uploads/4374199/normal_5f96bbdf859a2.pdf
    • https://cdn-cms.f-static.net/uploads/4417990/normal_5fb7049108b65.pdf
    • https://static.s123-cdn-static.com/uploads/4468843/normal_5fc5b1d4b3d85.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/tevigotu/55416539421.pdf
    • https://static1.squarespace.com/static/5fc16811df132613bbc14bb2/t/5fcf2cc37cc0b10a0acba271/1607412932210/73164674737.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c98d.bin
97e8296252f2f8d556707598527528490ca3ed057b8951a7e2e2d4c6957ba890		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC98D 5068 bytes
font_01_sfnt_off0000dae0.bin
b597e11715332c10cfd8218bc2fd33cd1532bf5b600204d1c6fa22eec5295024		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDAE0 10604 bytes
font_02_sfnt_off0000febe.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFEBE 4324 bytes

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