Malicious PDF — malware analysis report

Static analysis result for SHA-256 379717d4ad9dfcbf…

MALICIOUS

PDF

73.5 KB Created: 2020-12-28 05:18:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 1f75d3ff21da1e83d60b761bdafa3d88 SHA-1: 86a13ba0651bf7cc850ab852880c8ba6e70be07f SHA-256: 379717d4ad9dfcbf1bcc65667169df28f4b33c89cbf6011c35942533efb0364d
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains multiple embedded URLs, many of which point to disposable hosting services and are part of a link farm, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though heavily obfuscated, contains text related to emulators, reinforcing the lure.

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 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.
  • 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://traffking.ru/strik?utm_term=gba+emulator+iphone+ios+14 PDF link annotation
    • https://puzuzabijil.weebly.com/uploads/1/3/2/8/132814257/9243767f1e04.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403824/normal_5fa7dd7feb403.pdfIn PDF document text
    • https://cdn.sqhk.co/xumobopore/oi3sjaT/recarga_facil_free_fire.pdfIn PDF document text
    • https://puzagejezazi.weebly.com/uploads/1/3/4/4/134465952/3673832.pdfIn PDF document text
    • https://cdn.sqhk.co/semegopo/jKZbgeY/4155402913.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/xekena.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370737/normal_5fcbb7efe846b.pdfIn PDF document text
    • https://teraludejos.weebly.com/uploads/1/3/5/3/135304334/dugezijirigevot_nigunevagusigu_netidevox_jizubebomugi.pdfIn PDF document text
    • https://kazigujexumakul.weebly.com/uploads/1/3/4/3/134320364/3830580.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/3006c88f-15c0-4a90-9d2a-894eb9704024/xikiditesesapig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81efbeb4-785f-4fe1-8bd7-f8ca6204581c/bullet_force_download_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/oxford_bookworms_level_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dec86d91-ab99-4192-aa68-5af3ec94ea34/19004105573.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9747765c-236d-45d2-892f-83292bea4f7f/jst_time_to_est.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1127cd22-3dd3-40f3-878e-21c1c129b130/mekika.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_off0000e318.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE318 5372 bytes
SHA-256: 30f36671d3f4f508bf093a126a4fd962b8395855ae548a1630783211a7afe1c4
font_01_sfnt_off0000f534.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF534 10672 bytes
SHA-256: 4523a2d3aa8f769aba8f4ec45eb946cf60acaf9bf99f08af39a974c2f1eda59c

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