Malicious PDF — malware analysis report

Static analysis result for SHA-256 17f7923b680b163b…

MALICIOUS

PDF

73.8 KB Created: 2021-04-04 13:17:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 397cf4bca982d9346f005ae52e5bdd5c SHA-1: 67b7564c7959cb3efee12d4792a15421e0409594 SHA-256: 17f7923b680b163b2066117df32328588d4cc5bfdafacadb86eff6aa2c4a76df
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded URLs, many pointing to disposable domains and link farms, suggesting a phishing lure for software downloads. The document body, though heavily obfuscated, appears to reference 'Logitech f710 wireless gamepad driver windows 10', reinforcing the phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://seumenha.ru/strik?utm_term=logitech+f710+wireless+gamepad+driver+windows+10 PDF link annotation
    • https://sagelaxun.weebly.com/uploads/1/3/4/5/134594749/bepowi_runav_kitigudolajopez_xideburan.pdfIn PDF document text
    • http://salonlabs.xyz/john_deere_x320_snowblower_manualcijoy.pdfIn PDF document text
    • http://vufajed.getenjoyment.net/aditivos_quimicos_nos_alimentos.pdfIn PDF document text
    • https://torevoxun.weebly.com/uploads/1/3/2/7/132712334/melivefuzez_buledilopu_tasojif_morulupobabenag.pdfIn PDF document text
    • http://50offshop.pro/exercicios_bissetriz_de_um_angulo_70og9s.pdfIn PDF document text
    • http://lorem.space/modozebavip0wp1y.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499319/normal_604eeb4e7620a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413966/normal_5fe6cd2fc8c14.pdfIn PDF document text
    • https://vulabomanuxuw.weebly.com/uploads/1/3/4/8/134857085/3946736.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413865/normal_5fe5716b2fe99.pdfIn PDF document text
    • https://peliwotamo.weebly.com/uploads/1/3/5/3/135325711/nudebe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485005/normal_60279f0fcaeb8.pdfIn PDF document text
    • https://jawuvufos.weebly.com/uploads/1/3/4/8/134856807/3088020.pdfIn PDF document text
    • http://gufutaca1.xyz/24143427319ic8cf.pdfIn PDF document text
    • http://sugameloxufe.mywebcommunity.org/internal_audit_jobs_in_south_africa.pdfIn PDF document text
    • https://fuwanitawoge.weebly.com/uploads/1/3/4/4/134436239/3936841.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448339/normal_5ff8598e27351.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/safago/gulinudino.pdfIn PDF document text
    • https://s3.amazonaws.com/fukepez/heathens_roblox_piano_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/kalnirnay_calendar_aug_2019_marathi.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_off0000dd6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD6E 5936 bytes
SHA-256: c0651821144a1ec5e5ece3a9a046fe9fc3ab3f0d5e16359ec2cf7a00242b079d
font_01_sfnt_off0000f1aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1AA 11756 bytes
SHA-256: 13719dee21f4db868d6248ee84247ba78d82bd8685cb577fde6ce7a525aa26e4

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