Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bd1c059aa3b43c6…

MALICIOUS

PDF

70.3 KB Created: 2020-12-06 23:40:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 75ca7ff63a7b0a14cbd0a05a3c7cfce5 SHA-1: 1721902152f54f5b3a687637843f089e06402a33 SHA-256: 5bd1c059aa3b43c645285469b9cd8c24b1ef938aea022449221414a1c5b666e4
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which are part of a link farm designed to artificially boost search engine rankings. The document body, though heavily obfuscated, appears to reference 'Gta san andreas mods apk', suggesting a lure to trick users into visiting malicious or compromised websites. The presence of PDF_SEO_LINK_FARM and PDF_URI heuristics, along with the ClamAV detection, strongly indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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 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://trafftec.ru/123?utm_term=gta+san+andreas+mods+apk PDF link annotation
    • https://digokevun.weebly.com/uploads/1/3/4/7/134747151/a4ebc4.pdfIn PDF document text
    • https://nipoxumafoji.weebly.com/uploads/1/3/4/7/134717148/zageforusekudud_lotarifax.pdfIn PDF document text
    • https://nigupisotaku.weebly.com/uploads/1/3/4/3/134374455/d6b00e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc1a55868612547ed6365a0/t/5fc4b269a97599144e8d4bba/1606726256546/88903663998.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc13908affbf90a66ec9ac0/t/5fc4be464e98326c02a6e74e/1606729286348/kaxamale.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdf3953570fb44d1c8743e/1606284181564/minecraft_force_op_unban_tool.pdfIn PDF document text
    • https://s3.amazonaws.com/suximawo/dibujarte_coleccion.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e006a879396864083677/t/5fc229ca3485235c860fb982/1606560203858/how_to_tell_if_a_relation_is_a_function_without_graphing.pdfIn PDF document text
    • https://s3.amazonaws.com/zasepo/spanish_conditional_tense_worksheet.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd1f17f4403c7016359f97/1606229784308/tao_of_badass.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_off0000d748.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD748 5168 bytes
SHA-256: d6c8ac86b9cd5fa48c97151d77372753f7b1e27a7a3cfd13b119e6e364cf676b
font_01_sfnt_off0000e8c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8C8 10376 bytes
SHA-256: 75636f4f31dc319bc97db036e896132c79b6691d9a09f33bb3fd7a2657900a26

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