Malicious PDF — malware analysis report

Static analysis result for SHA-256 05be35b7e3e1a4e9…

MALICIOUS

PDF

76.3 KB Created: 2021-03-14 16:32:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: da3ed8f63ecb088ae26b6abe687ad178 SHA-1: 4e60ee6a33ebdac0f94e3211ec4753df7ef37f2e SHA-256: 05be35b7e3e1a4e98bc37213f48c81b0937263231f0a624470b8be5115f331a0
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to direct users to malicious content. The 'Pokemon apk android oyun club' keyword in one of the URLs indicates a lure for popular software. ClamAV and ML classifiers also flagged this PDF as malicious, supporting the assessment of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://gimoguvi.ru/wix?keyword=pokemon+apk+android+oyun+club PDF link annotation
    • https://mejatuwunuzawe.weebly.com/uploads/1/3/0/7/130775850/julidinar-juvoduvakes-pabokipimiro.pdfIn PDF document text
    • https://kijaxupujik.weebly.com/uploads/1/3/2/6/132695195/sisakatevopojo.pdfIn PDF document text
    • http://watertea.space/66972073642ivxdv.pdfIn PDF document text
    • http://jufawet.iblogger.org/nevurawufasajuvizovu.pdfIn PDF document text
    • https://nexojavadu.weebly.com/uploads/1/3/0/7/130775828/rawepazafowoxav_nudureziletafe.pdfIn PDF document text
    • http://vkysnaya-eda.site/wizezukijes2lvds.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://b1b0174c-961c-4936-87f6-765e1132391e.filesusr.com/ugd/6cf804_ca537484b6d548f4852e3c789b9b590a.pdf?index=trueIn PDF document text
    • https://6d4a8fb0-9a8a-4850-8aa1-2b5706121c9a.filesusr.com/ugd/ff2e72_d3965571f403457d8df736b36207e660.pdf?index=trueIn PDF document text
    • http://xadamun.epizy.com/xawusevupimitepatog.pdfIn PDF document text
    • https://de315c38-daa2-4293-b666-e554ba9b7d65.filesusr.com/ugd/564d2e_8b29ed7aeba94297b13c0e2a227de54a.pdf?index=trueIn PDF document text
    • https://c064424b-11a8-4e39-a524-24a74bcd733d.filesusr.com/ugd/54e393_42d8a1e83e9241fb8bdc035170bbcd9b.pdf?index=trueIn PDF document text
    • https://83372c7a-1065-4b07-8284-b64562b46e84.filesusr.com/ugd/035489_e6f1904e375a4514a5402a36a9ff848c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/ladojenefe/bal_krishna_wallpaper_hd_full_size.pdfIn PDF document text
    • https://9170d309-caca-4186-8987-bf6b40ce219c.filesusr.com/ugd/baef12_eedc19581e554d55aa9693c218379ef4.pdf?index=trueIn PDF document text
    • https://8f6f9f04-f977-4239-955d-f6aecf2dd879.filesusr.com/ugd/81cd61_51317cea7b7442fea449bf26bd2c4c4f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/doxifuba/80182530727.pdfIn PDF document text
    • https://s3.amazonaws.com/mokamoba/81608421579.pdfIn PDF document text
    • https://6f12065f-c45d-410c-b048-6ec23fb2b810.filesusr.com/ugd/02ccf7_ff69c56cdd574e10b4164433a5297226.pdf?index=trueIn 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_off0000ea00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA00 5348 bytes
SHA-256: d654372257e5ace06c7a5dcd3649be8c704597d59def1b2f5ceb6bd2d6f6b4ae
font_01_sfnt_off0000fc21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC21 12116 bytes
SHA-256: dec0bdc32d5cd8ae2bdf63985e0312cb87935700505c07e3a1ce542d7cf73c37

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