Malicious PDF — malware analysis report

Static analysis result for SHA-256 499884a8c0230d50…

MALICIOUS

PDF

79.1 KB Created: 2021-02-20 02:30:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 9f965cdaf5bdef879e1c2387eb56453f SHA-1: c62d39c72549c0297067012cc3fde5e34708d55e SHA-256: 499884a8c0230d500faf61281a15473831b0e8cb6937183b48dc8f9a7941605a
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, with several pointing to disposable domains and one specifically identified as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. The document body, though heavily obfuscated, contains text related to the URL 'Is a 15 dollar tip good', suggesting a 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://bologen.ru/strik?utm_term=is+a+15+dollar+tip+good PDF link annotation
    • http://krokoboko3.xyz/wanotuvixoqcr2m.pdfIn PDF document text
    • http://texulateniz.iblogger.org/lifukikavoxinof.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456114/normal_5ffd826bb5c97.pdfIn PDF document text
    • https://pilewamef.weebly.com/uploads/1/3/4/8/134849526/5886376.pdfIn PDF document text
    • https://cdn.sqhk.co/gabixeme/e6jejfq/berakifatapuko.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375509/normal_5fed2fc42c076.pdfIn PDF document text
    • https://cdn.sqhk.co/dewobube/dhbf2Pc/22007551112.pdfIn PDF document text
    • http://therarbooks.com/zunep2iucd.pdfIn PDF document text
    • https://gitujibexilen.weebly.com/uploads/1/3/1/4/131406430/3152084.pdfIn PDF document text
    • https://cdn.sqhk.co/vimerokil/09ctji0/knives_out_house_floor_plan.pdfIn PDF document text
    • https://juvarefuj.weebly.com/uploads/1/3/1/3/131398009/727d093c5996ba4.pdfIn PDF document text
    • https://gufakapefevem.weebly.com/uploads/1/3/5/9/135994046/fogupixekuzujip_romerem_wusevisuzatabub_taditiriviz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xujamaxopubisa.rf.gd/25450124884.pdfIn PDF document text
    • https://s3.amazonaws.com/rorives/literature_review_assignment_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/nakuzafol/34109807841.pdfIn PDF document text
    • http://wozadubokurego.epizy.com/resume_handbill_template.pdfIn PDF document text
    • https://s3.amazonaws.com/gelawiweza/how_s_life_going_best_answer.pdfIn PDF document text
    • https://s3.amazonaws.com/bisegilupuf/dotudujofisuneriw.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE70 5240 bytes
SHA-256: 4e190eec48cf4165504179e4215c218ae87164f88eaaccdb4ad38bebf0e26cd4
font_01_sfnt_off0000f057.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF057 11504 bytes
SHA-256: 6fa57a3b2306d6e99d9b5fd4b8786d67c14870523ad4945abfd7e28cb8554a61
font_02_sfnt_off000117ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117EA 16312 bytes
SHA-256: bf8f9ece8d9d74ce2d7a98a07ee1bb8f4056faf702b3b1702118181e85f1b939

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