Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3ea18d534afe9f4…

MALICIOUS

PDF

82.3 KB Created: 2021-03-29 08:59:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aa84f4562405ae0d0e80815c69930f86 SHA-1: 773ca8d9f10027eb0776ffa670cd13093f4e339e SHA-256: e3ea18d534afe9f4b6f552c7102cb5f8f9adc0b3e7589df3c7cc332c6ab380f4
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one prominent URL suggesting a lure related to a 'kasambahay contract template'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or to download further payloads. Although no scripts were explicitly extracted, the PDF structure and heuristic firings point towards a malicious document designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://xezojetit.ru/123?utm_term=kasambahay+contract+template+dole
    • http://istlan.space/how_to_lighten_up_a_grey_roommgtvu.pdf
    • https://pomavedakese.weebly.com/uploads/1/3/1/8/131871772/melavikitikekir-vidazekalanu.pdf
    • https://cdn.sqhk.co/wekaradukuve/aFgcUgj/dadabatasurafizekosure.pdf
    • https://static.s123-cdn-static.com/uploads/4382629/normal_600636532f030.pdf
    • https://tevupiju.weebly.com/uploads/1/3/4/8/134865653/638c8fb928f97.pdf
    • https://cdn-cms.f-static.net/uploads/4405904/normal_5fe6a35eeb97b.pdf
    • https://veralekixa.weebly.com/uploads/1/3/1/0/131069874/suriv-nunuvi.pdf
    • https://cdn-cms.f-static.net/uploads/4489440/normal_6042dc855cea4.pdf
    • https://cdn.sqhk.co/rogolafu/sugiDW5/rumojavav.pdf
    • https://loropigofog.weebly.com/uploads/1/3/4/5/134595907/melefagotezipi.pdf
    • http://gradstroy.su/how_to_change_oil_in_2010_priusfx9f2.pdf
    • http://mediaverifiedbadge.com/vudolepinadedixuvgqf.pdf
    • https://cdn.sqhk.co/fubebevukad/sggnFkI/rofizalajekap.pdf
    • https://supuzuvafexag.weebly.com/uploads/1/3/5/3/135383103/2571411.pdf
    • https://cdn.sqhk.co/xupodafib/cP8H6C1/nike_run_club_app_training_plans.pdf
    • https://dakesepev.weebly.com/uploads/1/3/4/3/134308776/4213646.pdf
    • http://milanomoda-italy.site/youth_conference_agenda_templatejzuah.pdf
    • https://cdn-cms.f-static.net/uploads/4460066/normal_6020b5e83ae50.pdf
    • https://kugavibutatabo.weebly.com/uploads/1/3/4/6/134613496/88429b7588572.pdf
    • https://cdn.sqhk.co/wejagamewo/gclxzI1/nugikaludava.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wexukufedepim/chevy_malibu_2012_repair_manual.pdf
    • https://s3.amazonaws.com/dofufiri/aldi_talk_app_apk_free.pdf
    • https://s3.amazonaws.com/wulagisi/ganesh_bhakti_ringtone_pagalworld.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f814.bin
01007042bb68c44886dc563c771ddafc014572b858e908276b178db27e7bdef0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF814 5524 bytes
font_01_sfnt_off00010aae.bin
51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10AAE 1800 bytes
font_02_sfnt_off0001133c.bin
837fd03ce00ac2c8e70a459e240e6f6334dbddbad6e65210581dce1f60bb5e5a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1133C 11236 bytes

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