Malicious PDF — malware analysis report

Static analysis result for SHA-256 cee09d879ca29882…

MALICIOUS

PDF

70.1 KB Created: 2021-04-06 00:52:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: db38b72c12aa698016a47a1dc1f65792 SHA-1: b53a1e54344a045782edd510c06f1e5c7bac2c81 SHA-256: cee09d879ca29882fbfd124c9e1049af7950a9d4585d40204171fb240d3dac9c
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains an embedded URI pointing to 'https://dafemum.ru/strik?utm_term=ps3+universal+remote+control+codes', which is likely the destination for the phishing attempt. The document body, though heavily obfuscated, contains text related to 'Ps3 universal remote control codes', reinforcing the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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 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=ps3+universal+remote+control+codes
    • http://gapilojazixo.getenjoyment.net/26533680599.pdf
    • http://napufokotipo.getenjoyment.net/non_destructive_testing_jobs_for_freshers.pdf
    • http://garanibukumom.scienceontheweb.net/acto_administrativo_en_mexico.pdf
    • http://wivevadevenumet.mywebcommunity.org/4195826004.pdf
    • http://difuraw.22web.org/1st_grade_worksheets_ela.pdf
    • http://wigisosidika.22web.org/epidemiologia_del_cancer_cervicouterino_en_mexico.pdf
    • http://tafakiduwav.scienceontheweb.net/56145276474.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/219981e4-6a39-4c22-bbfa-7cbc2082916c/binuxexodinabol.pdf
    • http://pogewukabuk.epizy.com/esp8266_datasheet_timer.pdf
    • https://fa0867c9-8cf0-46f9-bfae-aad8e49c21f3.filesusr.com/ugd/cdba2c_a021df6821eb468fabfab8cf4fca6687.pdf?index=true
    • http://nidawijonag.rf.gd/botulismo_canino.pdf
    • https://aa514bbb-a96e-4bc9-8ff3-0ca2edd1104f.filesusr.com/ugd/3fc21f_c928abe3e69b436dab61481d39bab6f2.pdf?index=true
    • http://vawomazaxiweliz.epizy.com/xirorunarukozebitan.pdf
    • http://pabudixobo.epizy.com/john_deere_345_for_sale_canada.pdf
    • https://uploads.strikinglycdn.com/files/e9f3c2b5-df41-4f73-b824-eb8afef4868f/iatf_16949_internal_auditor_training_ppt.pdf
    • http://sesetufeguvarod.epizy.com/nedubirivupikud.pdf
    • https://b84c3727-5d5a-4c5d-9d5d-21cac87b3a69.filesusr.com/ugd/fdd6c2_59131a9552094f6a9e33b77f12d9a29c.pdf?index=true
    • http://vipagepegavazus.epizy.com/12431001523.pdf
    • http://mewexudidis.epizy.com/how_forests_think.pdf
    • http://wimutojodi.rf.gd/87805646294.pdf
    • https://uploads.strikinglycdn.com/files/42a0ef43-6f8b-456b-b80f-44a1512c77f5/vox_ad30vt_speaker_upgrade.pdf
    • http://nelivizazepafo.epizy.com/afterglow_headset_xbox_360_setup.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d47d.bin
b59505d1e2e6508d6e3f2a7b201ac90023b8bd604826c162d7439152e7da013f
pdf-font-stream PDF embedded font (sfnt) at offset 0xD47D 5308 bytes
font_01_sfnt_off0000e674.bin
a0b22221ef07e26da445ec9201057b5833579824197307bb304428248538e008
pdf-font-stream PDF embedded font (sfnt) at offset 0xE674 10868 bytes