Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd692e08d9ae7d9b…

MALICIOUS

PDF

70.7 KB Created: 2021-03-14 05:45:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: b8db09d96d8b629986946ac6540aaf02 SHA-1: a9e60c6eb22b77712fa5b701e70a07d1ef92def9 SHA-256: cd692e08d9ae7d9b526dc3247e70caa786147df88d67b10f226c5d68670b5e4d
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 high likelihood of malicious intent. It contains numerous external URLs, with one prominent URL pointing to a domain associated with phishing or malware distribution. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the PDF is designed to host many links on disposable domains, further supporting a malicious purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://seumenha.ru/strik?utm_term=why+is+captivity+bad+for+animals PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4421623/normal_6033fdce13dfe.pdfIn PDF document text
    • http://ru-payment.casa/hp_laserjet_p3015_roller_kit_instructionsca0qx.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460446/normal_60291f086ded3.pdfIn PDF document text
    • http://moneymaya.site/secret_garden_restaurant_cagayan_de_orofd6nu.pdfIn PDF document text
    • http://antonioita.fun/ezreal_guide_2019787bh.pdfIn PDF document text
    • http://golden-charm.ru/contax_g1_street_photography1avbx.pdfIn PDF document text
    • http://help-verifiedbadgecenter.com/does_osha_require_chin_straps_on_hard_hatsidysj.pdfIn PDF document text
    • http://about-fb-support.com/godfather_2_game_trke_yamaswxdw.pdfIn PDF document text
    • http://dasopifumos.iblogger.org/how_are_ar_book_levels_determined.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374954/normal_5fc7f490515eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416653/normal_600c5241e83de.pdfIn PDF document text
    • http://leree4.club/100_million_ways_to_die_in_the_west0vf5a.pdfIn PDF document text
    • http://bigpleasure.ru/parrot_mki9200_update_file_download5u1bg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471959/normal_5fddce23b69de.pdfIn PDF document text
    • http://deviditiposu.iblogger.org/split_combine_files.pdfIn PDF document text
    • http://cleanup-sale.site/diccionario_rae_dudas_consultasekby5.pdfIn PDF document text
    • http://coolmag.biz/4854603528251xy4.pdfIn PDF document text
    • http://sodalabs.club/jesus_christ_the_healer_versem2e39.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://fonunegemo.epizy.com/tawogilananob.pdfIn PDF document text
    • http://momosetid.rf.gd/zefigupomuxo.pdfIn PDF document text
    • http://jajunoz.rf.gd/gunojakefugizilafod.pdfIn PDF document text
    • http://lozadubevapoke.epizy.com/sikonezad.pdfIn PDF document text
    • http://lirofad.epizy.com/how_to_fix_ge_washer_not_draining.pdfIn PDF document text
    • http://bepenaguvofiw.epizy.com/breville_smart_oven_air_fryer_french_fries.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA8C 5380 bytes
SHA-256: 6ab4755b7f2eb64155e464988b90202d5e1c4eb8b1728f88ee4d33008f6830ee
font_01_sfnt_off0000dca5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCA5 10180 bytes
SHA-256: 23e0cb6f93e2df98735b24770953a1e2bd9b359b88f030fb96ab92b4d8d5b757
font_02_sfnt_off0000ff00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF00 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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