Malicious PDF — malware analysis report

Static analysis result for SHA-256 c239a9569ff65667…

MALICIOUS

PDF

72.4 KB Created: 2021-06-14 13:51:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 0bfc124dcff20ba8e30f9ea39a670255 SHA-1: 54db45095ca80a199dff1776a8d9bfb5a13cc9ca SHA-256: c239a9569ff6566719bfbd5a305db03eacb27b907df28bcb4a552e562e37358e
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. It contains numerous embedded URLs, with one prominent URL pointing to a download for 'cleo gold apk download no root', suggesting a lure for potentially unwanted or malicious applications. The presence of multiple disposable hosting links further supports a malicious intent to distribute content.

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://laborke.ru/pbw?utm_term=cleo+gold+apk+download+no+root PDF link annotation
    • https://static.s123-cdn-static-d.com/uploads/4380393/normal_60b3e20fc7031.pdfIn PDF document text
    • https://nilanifaken.weebly.com/uploads/1/3/4/7/134702232/bilivusijadegafo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466173/normal_60bcd4b637d91.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495531/normal_5ffe4ffbe579b.pdfIn PDF document text
    • https://dasifapuzo.weebly.com/uploads/1/3/1/4/131454731/radosesewukunerira.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381976/normal_5ff147c07d77a.pdfIn PDF document text
    • https://vusuvokitajize.weebly.com/uploads/1/3/0/8/130874031/aba6a689fc.pdfIn PDF document text
    • https://bezixaror.weebly.com/uploads/1/3/0/7/130739980/pogonuwetebizij-xawuvewa-bawimufomu-tulizasunanade.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502817/normal_5fccb2251268c.pdfIn PDF document text
    • https://lukogazusewof.weebly.com/uploads/1/3/4/6/134643336/8773319.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xagewip.pbworks.com/f/mini_militia_pro_pack_mod.pdfIn PDF document text
    • http://gijorugisaw.pbworks.com/w/file/fetch/144716145/juzirimiravasuwufufate.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3666a668-bceb-46e2-9025-c1050e0598d0/a_thousand_splendid_suns_literary_devices.pdfIn PDF document text
    • http://molosafokaji.pbworks.com/f/driverfix_licence_key_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/470287b4-3738-408e-9983-f063873020d6/sonru_bluetooth_5.0_transmitter_receiver_user_manual.pdfIn PDF document text
    • http://wuranosa.pbworks.com/f/13738257677.pdfIn PDF document text
    • http://kesowununak.pbworks.com/f/48086254054.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac09b68a-2793-4d28-85b3-e3d9d208bf99/38195074674.pdfIn PDF document text
    • http://xixokuzujoz.pbworks.com/w/file/fetch/144930060/mikedumakawov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eeb4ab5a-9d73-4c28-ab07-33f67046cf23/ubuntu_server_installtoppm.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d01b0cef-6680-40cf-a9f3-6df5f11af9ef/what_size_tires_does_a_2016_toyota_corolla_s_have.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_off0000dde1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDE1 5008 bytes
SHA-256: 5c8bea0365130f33290e04763354f5e16fdf29c7faa06c5cf1e48add0c0870fb
font_01_sfnt_off0000ef0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF0D 11000 bytes
SHA-256: 36feae834210e09ca493903bdbfb5d7999d9e4dca8acd87f14017e86d4577660

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