Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ce71107b9b7a5e1…

MALICIOUS

PDF

68.5 KB Created: 2021-01-08 20:33:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 9c6198626408c21c413fa7fa1b226b0b SHA-1: 74971432cbcd3532e3b577b95a46ef8592ee81c9 SHA-256: 8ce71107b9b7a5e1c1d8741a2adfb6b60945fb0c0af80992142b922382e2bc6f
214 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 'PDF_MALICIOUS_REDIRECTOR_LINK' and the ML classifier strongly indicate malicious intent. The presence of a link farm suggests an attempt to generate traffic or distribute further 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
  • 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.
  • 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://gettraff.ru/123?utm_term=holy+priest+bis+enchants+classic In PDF document text
    • https://dawugagulinejud.weebly.com/uploads/1/3/4/3/134368664/nixibokulagavun-winozemepo-sodimovu.pdfIn PDF document text
    • https://mekowoto.weebly.com/uploads/1/3/0/7/130738632/9536359.pdfIn PDF document text
    • https://boguvetasitob.weebly.com/uploads/1/3/1/3/131380850/8a68c5dc19.pdfIn PDF document text
    • https://zatajiwivovib.weebly.com/uploads/1/3/4/5/134529671/1a24056e8c250b.pdfIn PDF document text
    • https://fenotitejov.weebly.com/uploads/1/3/5/3/135316040/9103401.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/2a2a0eee-bbdf-4c29-92a3-06c29de100e6/30533796826.pdfIn PDF document text
    • https://s3.amazonaws.com/lomiwexuva/58198755839.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzaganog/mizenejigegasox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c8de084-63a0-4e08-9530-54805bc4bd31/zatozosutezotetaduwuwu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd299566-3b70-4819-a665-157501704357/d_d_heroes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5442a59a-233c-4551-b29d-c5ebb99ba60f/doxizobajam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38d27678-7b3b-44c1-93aa-bfa14c5892b0/tank_hero_laser_wars_pro_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/xarojapi/30006995834.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1810e2b-eb8d-4479-9842-972cf779fbdc/15154292128.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_off0000ceee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEEE 5224 bytes
SHA-256: e4e1bd651c7a2147662ea3032011d24b6de8a5d764c980bd059e36ccf7a9b21a
font_01_sfnt_off0000e0af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0AF 10840 bytes
SHA-256: 473d22d108adcd56e32c176b5bcaf27008be65928091a9d1cf2c1483f1b7111c

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