Malicious PDF — malware analysis report

Static analysis result for SHA-256 22e68d7b65e04d05…

MALICIOUS

PDF

84.7 KB Created: 2021-03-29 11:52:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 419b835ac5968b634180b3537ac97410 SHA-1: 673d3d948e962092c094b757d1e2714ba8bc67fc SHA-256: 22e68d7b65e04d05d9fdc205e7609aea542dc420a6f9695718be6077265d064a
126 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, with a primary focus on 'fokemale.ru', suggesting a redirection to a malicious site. The presence of PDF-specific heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports the malicious intent of using the document as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://fokemale.ru/123?utm_term=graveyard+keeper+guide+book PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4484383/normal_603b22a6bfa3e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421360/normal_5ff1d7bbc71c1.pdfIn PDF document text
    • https://wujewogo.weebly.com/uploads/1/3/4/5/134586314/durujajumunuseregowe.pdfIn PDF document text
    • https://cdn.sqhk.co/dikonutudibe/hcmnBgg/redumakisimejumivujene.pdfIn PDF document text
    • https://wojopegoguw.weebly.com/uploads/1/3/4/6/134690206/6651353.pdfIn PDF document text
    • https://puralabeno.weebly.com/uploads/1/3/2/8/132814071/3b9fb08.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409123/normal_6061654b0c49d.pdfIn PDF document text
    • https://cdn.sqhk.co/nobutowug/Ohg1xha/garage_woodworking_shop_layout_plans.pdfIn PDF document text
    • http://golulim.iblogger.org/bartender_label_design_software.pdfIn PDF document text
    • https://gilotimo.weebly.com/uploads/1/3/4/8/134899899/4936902.pdfIn PDF document text
    • https://cdn.sqhk.co/dewufidabo/q0JjbrA/gotenajegozik.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485698/normal_60034f237ba32.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://vupiwenuwog.epizy.com/kidopusosogimavilipof.pdfIn PDF document text
    • http://wupubobetob.epizy.com/razer_surround_free.pdfIn PDF document text
    • http://tugupora.epizy.com/alaipayuthey_songs_free_tamilwire.pdfIn PDF document text
    • http://zisigogemewuju.epizy.com/nisamutefoxanoxoga.pdfIn PDF document text
    • https://c9b0c9dc-51ad-46ec-84b2-dbc26df53712.filesusr.com/ugd/b6f588_cf943b0ff4ad40979c06a78e6ff86a29.pdf?index=trueIn PDF document text
    • https://b913155d-2712-4fd4-bcc6-651970a8c456.filesusr.com/ugd/e39924_e65fe325a304433c8f8f58c33b993624.pdf?index=trueIn PDF document text
    • http://sipujajawe.epizy.com/55396169382.pdfIn PDF document text
    • http://dajilewewirerat.epizy.com/anlise_multivariada_de_dados_hair_2020.pdfIn PDF document text
    • http://bilovero.rf.gd/32740201366.pdfIn PDF document text
    • https://ed7c5604-ec0f-4ae6-9d22-6d534b57d154.filesusr.com/ugd/1d5a3f_49aab894de56427097fd1d7b44ec7a9e.pdf?index=trueIn PDF document text
    • https://1b15a19f-c8c2-4d9d-8c2f-e97aa7ecfe2c.filesusr.com/ugd/eb6c48_5b45613fc12f4379b079e2907fba25b9.pdf?index=trueIn 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_off0001024c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1024C 5012 bytes
SHA-256: d9f9a746b51175d161bc6eafb045253095c95f4eb826b7ce8946cf58f6c9adbc
font_01_sfnt_off00011377.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11377 10832 bytes
SHA-256: f9d73e88ee5d43e4c0927c96495a2d9501066d51f067eabc4a9e54aef7f9133d
font_02_sfnt_off0001377a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1377A 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f