Malicious PDF — malware analysis report

Static analysis result for SHA-256 38c1ba86610be757…

MALICIOUS

PDF

69.7 KB Created: 2020-12-09 07:01:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a31747839b97bfc331677d7f22b8bc28 SHA-1: 769a6f06ac102f9e4c0bab095683d1150e156469 SHA-256: 38c1ba86610be7575c53ad26412f453d634930a91b16b5cf7f84f0cca0c95373
252 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file contains numerous links, many of which point to disposable domains and are likely part of a link farm designed to generate traffic or distribute malware. One critical heuristic identified a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains references to 'Gta 5 apk full', suggesting a lure to trick users into clicking malicious links. The presence of multiple PDF links and a malicious redirector indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=gta+5+apk+full
    • https://duwelebizan.weebly.com/uploads/1/3/4/7/134701088/vipakazubip_wuxesaneguloz_jopovenu.pdf
    • https://cdn-cms.f-static.net/uploads/4481820/normal_5fb346051383c.pdf
    • https://jajivinejide.weebly.com/uploads/1/3/4/3/134354145/221060.pdf
    • https://cdn-cms.f-static.net/uploads/4378152/normal_5f8f9715372b8.pdf
    • https://vodoxuzet.weebly.com/uploads/1/3/2/6/132681632/wafofaben-wonoxeditijef-ruvowafigaj.pdf
    • https://sokifaxus.weebly.com/uploads/1/3/4/6/134666683/zenoxikudukekig.pdf
    • https://nenonafadigis.weebly.com/uploads/1/3/4/8/134856929/2561514.pdf
    • https://kagafalevusina.weebly.com/uploads/1/3/4/3/134368330/54be360ab93c634.pdf
    • https://numurivigafezu.weebly.com/uploads/1/3/4/3/134390613/b58ac521c4b.pdf
    • https://finivoxub.weebly.com/uploads/1/3/4/3/134387593/somigikitixuki.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/vuliwisuwig/learn_c_language_in_hindi.pdf
    • https://s3.amazonaws.com/zuvovoxigumuz/meeting_memorandum_template.pdf
    • https://static1.squarespace.com/static/5fc539263398ff75154a2945/t/5fcc24652bc7884852a4dc43/1607214182521/jumpstart_mtg_tcgplayer.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_off0000cad8.bin
9e0c62136db66f0cb26c97241a3b349f262368aaa6dc11af8986740166348243		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCAD8 4840 bytes
font_01_sfnt_off0000db6c.bin
daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDB6C 1800 bytes
font_02_sfnt_off0000e3fa.bin
bc6a9f21697e993608d774977022f6ac2fc2b3f7af383342fe890a59164b375b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE3FA 11076 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.