Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e4a448a1ba0fd9b…

MALICIOUS

PDF

79.0 KB Created: 2021-03-16 03:31:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 96f9d5d7b912e976af57ecc420a226aa SHA-1: d082afcd9609be06c15b6dfbbb677e27d1f871ea SHA-256: 8e4a448a1ba0fd9b54441c48e2dac22cce23b3b4697fc42643a117ab7869c29f
126 Risk Score

Malware Insights

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

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URLs, with one specifically identified as part of a link farm on disposable hosting, suggesting a phishing or redirection scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of techniques used to deliver malicious content or redirect users to attacker-controlled sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jacksth.ru/award?keyword=ceresit+cn+94+pdf PDF link annotation
    • https://bejeselujolir.weebly.com/uploads/1/3/1/3/131379719/8047779.pdfIn PDF document text
    • https://cdn.sqhk.co/vinizedanuve/wugc2D7/mine_mob_clicker_rpg.pdfIn PDF document text
    • http://fruittea.space/autobiography_of_a_slave_manzanozq0hz.pdfIn PDF document text
    • http://ourfanz.com/46321808575ci2vh.pdfIn PDF document text
    • http://callipakk2.site/loridapisaiz2o.pdfIn PDF document text
    • https://cdn.sqhk.co/xaripisi/jfKihif/merge_quest_heroes.pdfIn PDF document text
    • http://filuxunokenobud.mygamesonline.org/luwokipu.pdfIn PDF document text
    • http://foxiduwanati.mygamesonline.org/28614631240.pdfIn PDF document text
    • https://gapigapale.weebly.com/uploads/1/3/4/8/134896702/6130179.pdfIn PDF document text
    • http://nasty666.space/star_trek_timelines_wiki_dilemmas0gk3x.pdfIn PDF document text
    • http://siwivelijutore.medianewsonline.com/evan_moor_spelling_grade_2.pdfIn PDF document text
    • http://pigigozoruda.mypressonline.com/craftsman_zts_7500_parts_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/remezebona/fj2Ojal/mint_launcher_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/peluxisomex/dtQjjie/ripto_s_rage_icy_speedway_orb.pdfIn PDF document text
    • https://cdn.sqhk.co/vekokizijam/vjbIjjn/guess_the_movie_actors_malayalam_football_bird.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://lelupiborojez.epizy.com/artistic_fonts_for_logo_free.pdfIn PDF document text
    • https://901c4554-6fda-40bf-8344-1f1538f5dc06.filesusr.com/ugd/a76634_a488972ed48e45108c6816612d250a0a.pdf?index=trueIn PDF document text
    • http://jazopizebe.atwebpages.com/females.pdfIn PDF document text
    • http://seviridotif.epizy.com/microsoft_mcitp_certification_path.pdfIn PDF document text
    • https://107a3552-ed21-4f5d-95e3-510b6eae4444.filesusr.com/ugd/21bbef_6432bad3e6684754b78aec817ffb6492.pdf?index=trueIn PDF document text
    • https://ec451167-49e0-489e-a150-d7dc0ecf9264.filesusr.com/ugd/fe0276_f9cead250d8b419d8e24d96c155eec3b.pdf?index=trueIn PDF document text
    • http://paritoxo.rf.gd/80889966826.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e116.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE116 4852 bytes
SHA-256: c6667e4c9155b243cce3ca5280e00a39d4182712116a91a0c60e228e36e1f47b
font_01_sfnt_off0000f1a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A4 16364 bytes
SHA-256: ce29e3069705cc06fe1e4312f861174ed5edddc46e78aba4b947ac604e92552a
font_02_sfnt_off000120db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120DB 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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