Malicious PDF — malware analysis report

Static analysis result for SHA-256 72ba49f6188fef0f…

MALICIOUS

PDF

83.4 KB Created: 2020-12-29 20:12:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 15148575936d60cc2c481ef9bdf13857 SHA-1: 9249b798a4fd8e6ba44bde97f806b47f33ab1040 SHA-256: 72ba49f6188fef0fe6c228a22d8610021b8cbb57709163207300382852abb32e
284 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous links to external websites, many hosted on disposable domains, indicating a link farm or redirection scheme. The presence of 'Adidas nmd womens white' in the document body, combined with the malicious redirector link, suggests a phishing or scam lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for distributing further malware or conducting phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/strik?utm_term=adidas+nmd+womens+white In PDF document text
    • https://lonugawewubosil.weebly.com/uploads/1/3/4/6/134627014/nobumogazesojak_fulaladi_pafan_tupinuni.pdfIn PDF document text
    • https://gepavemu.weebly.com/uploads/1/3/4/8/134861499/duger.pdfIn macro / runtime command snippet
    • https://cdn-cms.f-static.net/uploads/4366976/normal_5f8c87670fa4c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368249/normal_5f8a3f7e4e038.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380403/normal_5fa688702b376.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487665/normal_5fbb399672298.pdfIn PDF document text
    • https://besozidemupi.weebly.com/uploads/1/3/4/6/134635439/f48ef2f7.pdfIn PDF document text
    • https://vulabomanuxuw.weebly.com/uploads/1/3/4/8/134857085/zakizugexafozuxowir.pdfIn PDF document text
    • https://bugalesatu.weebly.com/uploads/1/3/4/3/134309104/jadowetorifuwen-tinep-kewuw-xedejis.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489834/normal_5fe3eb2aef800.pdfIn PDF document text
    • https://lonugawewubosilIn macro / runtime command snippet
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/guwutivupudutu/43902839556.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010a23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A23 5020 bytes
SHA-256: af7ac67b7a9d3083a5a9e5dceb0c1cb90b08b9faf194aaf2d4f4a6246e0f55c4
font_01_sfnt_off00011b22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B22 11016 bytes
SHA-256: a02d4d85ed796b88f4551598567f67685daf2f98318c41ae90b777ba914cdf0a

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