Malicious PDF — malware analysis report

Static analysis result for SHA-256 07f7964d1ad6af11…

MALICIOUS

PDF

76.9 KB Created: 2021-04-06 15:48:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 80d0bfeeac17621e49be62c4147826ee SHA-1: df21a4d9dad502df62bcfc2b0be97f880572a7e0 SHA-256: 07f7964d1ad6af11dff68e4c4b3bdb910becb1da4995dfbdef8d51ad88ee00a0
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, specifically as a phishing trojan. It contains numerous embedded URLs pointing to disposable domains, indicating a link farm designed to redirect users to potentially harmful content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests this malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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=audio+technica+at-lp120xusb-bk PDF link annotation
    • http://powerhdniy.space/hum_aapke_hain_kaun_mp3_song_downloar443h.pdfIn PDF document text
    • http://nextauto02.ru/class_11th_biology_ncert_bookqz19b.pdfIn PDF document text
    • https://mizemetugez.weebly.com/uploads/1/3/4/3/134322353/7aef75.pdfIn PDF document text
    • http://tixshopclub.space/one_calculator_apk_purejclwg.pdfIn PDF document text
    • http://openlait.pro/ff14_ravana_hard_guide9jlnw.pdfIn PDF document text
    • http://mybatut.store/fevojazilogeliwuvmtbqo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415052/normal_5fee9c1c82204.pdfIn PDF document text
    • https://galovuxo.weebly.com/uploads/1/3/4/7/134760431/d6e0d.pdfIn PDF document text
    • https://gunujudota.weebly.com/uploads/1/3/2/3/132303168/gisomijanojebu.pdfIn PDF document text
    • http://solapp.xyz/joponujinovowexii7qb.pdfIn PDF document text
    • http://teachost.com/lumamuragijarg91gq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402938/normal_601bc27936980.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/feseni/what_jobs_can_you_get_with_a_civil_engineering_technology_degree.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fe32e7d-a187-4bf9-b2bd-3110fc1b19d9/fidapawejupiget.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3bd7105-64fd-4711-b8fd-ac4fd9925c23/63531171423.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/820e04e9-928d-411c-aa8f-4fa1475bf8c5/the_girl_with_the_dragon_tattoo_novel_series.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3c87dda-f328-4ce0-bdfd-d6315cef2822/kuvipoperexex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1eeaf27e-c39d-4e23-8301-4a151b7ce8c6/81332068882.pdfIn PDF document text
    • https://s3.amazonaws.com/xefezesebusu/pogo_tv_mr_bean_video.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_off0000ed5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED5F 5684 bytes
SHA-256: 62868b32d95337346a446159e21423abcd5d6491fce7022cc6fd76deee6d517f
font_01_sfnt_off000100b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100B8 11052 bytes
SHA-256: 67c4156ce1505d6cd9006ca939d2ed783372a27d2cf8da51fe4deeed0d53118a

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