Malicious PDF — malware analysis report

Static analysis result for SHA-256 c05e69e32d1fe2a1…

MALICIOUS

PDF

78.6 KB Created: 2021-01-28 03:18:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: ae0c5189ea2df45f4aea9832b0bdedae SHA-1: d85ed8a993d666582102cf67a14d05c24669558b SHA-256: c05e69e32d1fe2a10087b5edf7f05980be494681fafff65c9c7f734dbd3e377f
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a large number of external links, many pointing to disposable domains and hosting services, characteristic of a link farm designed to distribute malicious content or phish users. The presence of numerous external URIs and the PDF_SEO_LINK_FARM heuristic strongly suggest an attempt to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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://baarspo.ru/123?utm_term=old+english+game+bantam+club+of+america PDF link annotation
    • https://cdn.sqhk.co/zejizoguzut/Oibijib/space_heater_outdoor_lowes.pdfIn PDF document text
    • https://cdn.sqhk.co/vobipibomuk/gfMiihC/scummvm_games_collection_download.pdfIn PDF document text
    • http://copytoshka.ru/jack_frost_nipping_at_your_toesaofrm.pdfIn PDF document text
    • https://cdn.sqhk.co/pemiduwegam/4jjijlD/monster_truck_hero.pdfIn PDF document text
    • https://cdn.sqhk.co/xewasejeve/VhcGOhj/rixukesesotazemopetet.pdfIn PDF document text
    • https://ketumumev.weebly.com/uploads/1/3/5/3/135348104/gogomogezosewazut.pdfIn PDF document text
    • http://vkysnaya-eda.site/lidedenedelolibuwabidea0uo3.pdfIn PDF document text
    • http://effektzhizni.ru/58530656469ypc22.pdfIn PDF document text
    • https://cdn.sqhk.co/noxivudeva/bPujjHo/namco_tv_games_instructions.pdfIn PDF document text
    • https://cdn.sqhk.co/birenejar/gjjdhbk/movie_maternal_instinct_cast.pdfIn PDF document text
    • https://cdn.sqhk.co/tonufipu/jibgchb/bits_and_bolts_birkenshaw.pdfIn PDF document text
    • https://vejikawotepux.weebly.com/uploads/1/3/4/8/134887167/jeviboreretu-jodewa-wagefasobakonif.pdfIn PDF document text
    • https://cdn.sqhk.co/tiwefuxab/Egcyjgx/van_halen_twister_music_video.pdfIn PDF document text
    • https://cdn.sqhk.co/nepusoliweda/3hdhdjb/beyblade_burst_app_6._3_0_apk.pdfIn PDF document text
    • https://kibugisire.weebly.com/uploads/1/3/4/0/134018652/956943.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sudogirelokuf.epizy.com/57467582022.pdfIn PDF document text
    • http://pamiwumewamem.epizy.com/annexure_67_form_r.pdfIn PDF document text
    • http://xepalufozakot.epizy.com/beltone_hearmax_app_for_android.pdfIn PDF document text
    • http://repeputowuz.epizy.com/69229554386.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_off0000f1bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1BB 5600 bytes
SHA-256: 4c6c7650e6445694afcb8a472d1e4739bc74dcb86fb483b4c49eeb30fc0c0aaa
font_01_sfnt_off0001049e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1049E 12136 bytes
SHA-256: 4e5623890124c51f7fb4b794f4197d8b0fd19b79505b3a43fc9c9f8e8370f4a9

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