Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e7f48d1f92ea775…

MALICIOUS

PDF

152.6 KB Created: 2021-04-24 20:59:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ccfe52e4915a211884c0f2960e752f56 SHA-1: 31ef613e8e1e0f4b5aca3ba867b470a093544fea SHA-256: 1e7f48d1f92ea775e9f0c7807f94d98761840be8251d6c8e9ca2c5df9e6b6f07
124 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, suggesting a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'ML_NYX_PDF_MALICIOUS' strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of external URIs and the overall structure point towards a phishing lure designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6118

Heuristics 4

  • 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
  • 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://druttle.ru/strik?utm_term=computer+organization+and+architecture+lecture+notes+pdf+of+morris+mano
    • https://kuvinobugo.weebly.com/uploads/1/3/1/3/131383931/mabaperorovuda.pdf
    • https://cdn.sqhk.co/makekajet/haBYOij/youtube_music_videos_free_songs.pdf
    • https://judurufag.weebly.com/uploads/1/3/4/6/134688768/tukisurin.pdf
    • https://fukusegoboviv.weebly.com/uploads/1/3/1/8/131856281/937641390a53f3.pdf
    • https://kenoduzuran.weebly.com/uploads/1/3/5/3/135350653/nomifevesokedog.pdf
    • https://cdn-cms.f-static.net/uploads/4425237/normal_6024805921c32.pdf
    • https://cdn.sqhk.co/mivadunoxo/hhVhijv/jeux_de_vex_3_yepi.pdf
    • https://retevewaluwur.weebly.com/uploads/1/3/4/6/134600892/4913764.pdf
    • https://relorurexo.weebly.com/uploads/1/3/5/3/135391300/5471749.pdf
    • https://tobotegitemusir.weebly.com/uploads/1/3/4/6/134651307/xenobagoditivim.pdf
    • https://cdn.sqhk.co/wepiwojeta/LhaicGW/73439890107.pdf
    • https://cdn.sqhk.co/kuwusemob/qCyRcJP/fdic_call_report_glossary.pdf
    • https://cdn-cms.f-static.net/uploads/4488102/normal_602827fb77da6.pdf
    • https://totaguzoxexidi.weebly.com/uploads/1/3/2/7/132741029/talunejulul_fafokewef.pdf
    • https://zafudibibini.weebly.com/uploads/1/3/4/1/134108698/pugitukigiwazu_difozojakuwe_bunimowogupi_miwowenanivexe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://gutekuretejapoj.onlinewebshop.net/45834650668.pdf
    • http://lufopudizomuv.atwebpages.com/jaxajebawisamuzuwufib.pdf
    • http://dakafatuvuguviz.atwebpages.com/79114087462.pdf
    • https://uploads.strikinglycdn.com/files/c9bb4905-e727-420c-a5a1-f307c88f5061/el_lenguaje_del_cuerpo_julius_fast.pdf
    • https://uploads.strikinglycdn.com/files/831b8e41-bb03-4aaa-85ac-f27312ad3c3d/75761194061.pdf
    • http://sogivuwe.onlinewebshop.net/myers_briggs_relationship_compatibility_chart.pdf
    • https://uploads.strikinglycdn.com/files/129c6e53-710b-48b1-aef4-e11a156ec8c1/how_to_mind_control_anyone.pdf
    • http://naxesabefadufu.atwebpages.com/fewifekete.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002185a.bin
d1eca2e09c3a5e5e0be4ce63c04050ad479d8f31c8a0daec0893495a4881346a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2185A 5524 bytes
font_01_sfnt_off00022afb.bin
2f5b1f2e03db81a307cb66b45501527090e5c7016327e314658eb76662a98ab5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x22AFB 12392 bytes

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