Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1c7464b0235e9a4…

MALICIOUS

PDF

74.3 KB Created: 2021-03-10 00:57:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: c640484eb4bcdce8f239bebe41313086 SHA-1: f6df14975a2d1a1294e398db4b6878cc4ca653ad SHA-256: a1c7464b0235e9a4c020b569a3b7f8fc73c6a5d3d85fbcf22b82f0507e7d81ca
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with one prominent example being 'https://leonvi.ru/wix?keyword=edtpa+instructional+materials'. The PDF's structure and the presence of external links suggest it is designed to redirect users to potentially harmful websites, likely for credential harvesting or further malware delivery. No scripts were extracted, but the overall pattern indicates a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://leonvi.ru/wix?keyword=edtpa+instructional+materials PDF link annotation
    • https://cdn.sqhk.co/sitopizol/je36v0z/kezawonubunifobat.pdfIn PDF document text
    • http://nakrutkavk.site/street_fighter_5_mod_apk_android39il3.pdfIn PDF document text
    • https://cdn.sqhk.co/figakeves/bxjihhf/mamumevuzexe.pdfIn PDF document text
    • http://load-bcp.com/bellman_job_descriptionkw8vr.pdfIn PDF document text
    • https://cdn.sqhk.co/jenotefi/aW4hjP4/lumigan_vs_latanoprost_cost.pdfIn PDF document text
    • http://virona.org/statistics_for_psychology_6th_edition_access_codeu9bub.pdfIn PDF document text
    • http://kojazunupetip.mygamesonline.org/43182798063.pdfIn PDF document text
    • http://janorewaxeno.mygamesonline.org/44793446764.pdfIn PDF document text
    • https://cdn.sqhk.co/feguzuvubut/jdheigj/kingdom_rush_vengeance_tower_defense_games.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gajovab.epizy.com/lifisofaju.pdfIn PDF document text
    • https://s3.amazonaws.com/gewuwasi/picture_collage_maker_free_with_crack.pdfIn PDF document text
    • https://s3.amazonaws.com/gofilafixu/celebration_of_discipline_study_guide.pdfIn PDF document text
    • https://76f5a3e5-08d8-4581-9975-6c1b933a1845.filesusr.com/ugd/dbbd16_84b84979dd31490b8d871ad04ea846ee.pdf?index=trueIn PDF document text
    • https://ae0ecf71-49bb-4ac4-bba4-d0f2a20d1af9.filesusr.com/ugd/668a47_37b7db85ee41455c8ca38db912c094f3.pdf?index=trueIn PDF document text
    • http://nodezolejew.epizy.com/who_are_the_jump_rope_dudes.pdfIn PDF document text
    • https://5c839259-519f-4cee-a1a2-6639d654070b.filesusr.com/ugd/140efa_cf26a5924a164941952efe2252a2be4c.pdf?index=trueIn PDF document text
    • http://zexelebisitod.epizy.com/mufubusojanige.pdfIn PDF document text
    • https://s3.amazonaws.com/dazinibonofobi/purotoj.pdfIn PDF document text
    • https://451b78f8-089e-4d4d-bc4b-60abb621f7e6.filesusr.com/ugd/7ef0dc_b308b4ecf5ab47c58bdc2221850923ba.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nawuvud/kilepofubajexij.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_off0000e5ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5EC 5176 bytes
SHA-256: a64c1ce31680abb9e074cf984dd3e3bf427824c4082f678a35a5e5b3fbfd7e1f
font_01_sfnt_off0000f770.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF770 10748 bytes
SHA-256: f976632bb6d71576f043a3ac8d7253ba68390331a485a20dc9cbe2e3a2ee0627

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