Malicious PDF — malware analysis report

Static analysis result for SHA-256 22b93d72f65f4c9f…

MALICIOUS

PDF

84.7 KB Created: 2021-03-19 18:16:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c604fb82fe637d714f08436c3bc5bcf7 SHA-1: 9d68ecd66d017f2faf6e977d5a87b40fe4196da2 SHA-256: 22b93d72f65f4c9ff3e272462676e930c8c1628deefe78c434b9537d4607cf51
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://dafemum.ru/strik?utm_term=football+manager+2020+mobile+apkpure PDF link annotation
    • https://zeteleginogegop.weebly.com/uploads/1/3/4/5/134526156/juwetalupaw.pdfIn PDF document text
    • https://cdn.sqhk.co/lulufebexefe/dp8Riii/benoit_badiashile_scout_report.pdfIn PDF document text
    • https://cdn.sqhk.co/sezabaxo/ihegdib/24090591937.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376357/normal_6023bb111c5d6.pdfIn PDF document text
    • https://zepukuliro.weebly.com/uploads/1/3/5/9/135964459/seloja-kobob-jitebesefomave-nebif.pdfIn PDF document text
    • https://cdn.sqhk.co/tizuvuwo/jjLFqH1/toca_hair_salon_2_apk_installieren.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459628/normal_5fca7450a2769.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389823/normal_5fce62eabe0b5.pdfIn PDF document text
    • https://cdn.sqhk.co/foropogajag/gwijeWj/gunblood_western_shootout_unblocked_weebly.pdfIn PDF document text
    • https://cdn.sqhk.co/naxusepimosa/jdii7ec/78637772631.pdfIn PDF document text
    • https://cdn.sqhk.co/kelarega/3ggj5gi/memoji_apple_stickers_for_whatsapp_wastickerapps.pdfIn PDF document text
    • https://cdn.sqhk.co/wukorovev/jh2icRq/buzzfeed_tasty_blueberry_muffins.pdfIn PDF document text
    • https://cdn.sqhk.co/joxesinejag/Gpiak4A/trap_runners_merchandise.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387806/normal_6033e8206088a.pdfIn PDF document text
    • https://cdn.sqhk.co/fidapulano/nztnhiK/house_flipper_nintendo_switch_walkthrough.pdfIn PDF document text
    • https://zefivevolexu.weebly.com/uploads/1/3/1/6/131637056/xukabituzid_jumopipizavuli_saxolaboz.pdfIn PDF document text
    • https://cdn.sqhk.co/melipetoluf/ghbBhj7/retrovirus_replication_mechanism.pdfIn PDF document text
    • https://cdn.sqhk.co/miwataxanis/Hheszgg/wididimibixejolemesaxe.pdfIn PDF document text
    • https://cdn.sqhk.co/vetukalujir/hfjefCu/borizuzuzikuxebojalagitu.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://jopumogezev.epizy.com/95418697561.pdfIn PDF document text
    • http://mosawamowote.epizy.com/bajirao_mastani_movie_all_song_video.pdfIn PDF document text
    • http://fodabobaxuti.epizy.com/75533105691.pdfIn PDF document text
    • http://digotadegijo.epizy.com/78462921795.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6FD 5276 bytes
SHA-256: fd3855574c6f070f134b3192ebde8a8ea8bc884ae6e5a02c3778b22f89a4bbd9
font_01_sfnt_off0000f8d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8D3 12952 bytes
SHA-256: 26c4028e28bf083f904a9abafda9bfd188a7fa3a00a177c6ad311f281b1ca64a
font_02_sfnt_off00011fd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FD8 16204 bytes
SHA-256: 541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501
font_03_sfnt_off00013506.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13506 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361