Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ccfe79c53dadbfc…

MALICIOUS

PDF

73.5 KB Created: 2020-12-28 19:52:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 04553e41317904e21fd63db16d7f2297 SHA-1: 22ad5e6216d18873b8203312a0961136f2c11a1e SHA-256: 8ccfe79c53dadbfc20c577ecace96af266a86715ba1b60f7d862f28968f95155
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or malicious content delivery attempt. It contains a large number of embedded external links, with at least one identified as a potential phishing lure. No scripts were extracted, but the PDF structure itself is designed to direct users to external resources.

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://traffset.ru/strik?utm_term=rock+radio+stations+dallas PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4459629/normal_5fad2d2ee02e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485448/normal_5fe96f989ce8f.pdfIn PDF document text
    • https://fulipevaxavu.weebly.com/uploads/1/3/2/6/132695351/9997097.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366358/normal_5f872a6ea1b23.pdfIn PDF document text
    • https://cdn.sqhk.co/jumibizede/UZx8r8H/ninumewegatiripelub.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477864/normal_5fc9f7064c853.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487186/normal_5fe5eeb215796.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413578/normal_5fa21608b921c.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/6c0e138f-09e6-43fe-b0e6-3d11c60c059c/lock_screen_wallpaper_for_android_phone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7d3e511-b5e3-4f01-ac1e-5f3d6b4074fd/descargar_pes_club_manager_para_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d657b027-6b0e-4db7-b773-b5bc3f957c3e/16322131415.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c28e5695-7d5c-48dc-9a1b-2daa7fe1e94f/10471496077.pdfIn PDF document text
    • https://s3.amazonaws.com/tesotiwapax/futepiw.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_off0000e16b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE16B 5004 bytes
SHA-256: 4520194c60c798eb2bc66a75c5de548964196eaf59109694c52bdf159fce7872
font_01_sfnt_off0000f283.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF283 11492 bytes
SHA-256: 203f995ce126c153f873b6f7d58123bddbf3dc8651bb6f09e5da324246c3217b

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