Malicious PDF — malware analysis report

Static analysis result for SHA-256 de662af82d85d499…

MALICIOUS

PDF

71.5 KB Created: 2021-06-05 06:36:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 6b5a9c5c830808249aadee4bbf25a9d3 SHA-1: 516c772a40a4df4e4626ed9ed9cd060925de1560 SHA-256: de662af82d85d499a1dabf355fe1d94da09e821a7bbb57409fc9aafce0da74fc
126 Risk Score

Malware Insights

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

The PDF document contains a lure for a "Clash of Clans gems hack" and embeds multiple external URLs, one of which is a known phishing URL. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or credential harvesting. No scripts were extracted, but the embedded URLs and heuristic firings point to a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://ketchas.ru/pbw?utm_term=clash+of+clans+gems+hack+without+human+verification PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4449604/normal_5fce9ce78f198.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378843/normal_5ffdc4cb08c20.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403946/normal_60176d979b3cd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493553/normal_5fffba4939e0a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476142/normal_6017190e60e06.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471464/normal_601ba8d2e2667.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410953/normal_6033d48a98610.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404133/normal_604f6e76dff79.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451035/normal_6065a647bfd03.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413973/normal_60167b6934039.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449600/normal_60471a5a391e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446942/normal_600e6e751aca5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470703/normal_5fd08b8de7344.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365653/normal_5ffa94f9e81ed.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://juvupumanut.pbworks.com/w/file/fetch/144499044/wabam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7965398d-87e4-4659-a34e-0006d8405dee/samsung_tv_audio_output_settings.pdfIn PDF document text
    • http://taxexuwej.pbworks.com/f/how_to_set_up_element_roku_tv.pdfIn PDF document text
    • http://damopijos.pbworks.com/f/wiburosa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0168a2b1-4fa4-491d-85c9-c279b70ae1a7/ti_nspire_cx_calculator_price.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abaccf2d-e705-49cf-9fdc-69df100532c9/25100980278.pdfIn PDF document text
    • http://dipazuwawex.pbworks.com/f/99648866.pdfIn PDF document text
    • http://bamedun.pbworks.com/f/rojipug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11f1e754-245b-4169-a67d-001f6c543cd8/kuxetatel.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_off0000da77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA77 5416 bytes
SHA-256: 387e8434ee8887074c099c4f2b7f3a0fc0b8d107052bbb56c2c06d39b0ffa3ae
font_01_sfnt_off0000ecd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECD5 10368 bytes
SHA-256: d35d715de046456411c6da00273112586915de0979c4b4d32165a4e4ee4289c3

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