Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bdde76aaa4df23f…

MALICIOUS

PDF

66.2 KB Created: 2021-02-12 20:49:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: d991c1c5b223130a885e0af0073f00c8 SHA-1: 61dfd2bffcbc4c45230ae4d7894e0fea0bb36cc3 SHA-256: 9bdde76aaa4df23f45cd16f1b24bf2d4df390e7cd3f3fe98e9313de2b4bf583d
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with a primary lure related to a 'tactical magazine for sale'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of multiple disposable hosting links and UTM parameters suggests an attempt to obscure the final malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://crophysi.ru/123?utm_term=fnp+45+tactical+magazine+for+sale PDF link annotation
    • https://kurupatasewa.weebly.com/uploads/1/3/5/9/135958836/b9818d23b6628.pdfIn PDF document text
    • http://linogozajasupe.22web.org/calculator_vault_apps.pdfIn PDF document text
    • http://jodesomuxuduzu.22web.org/demunivalawiwe.pdfIn PDF document text
    • https://cdn.sqhk.co/nopawuwam/bieojhm/roman_emperors_family_tree.pdfIn PDF document text
    • https://cdn.sqhk.co/mifodirula/jagfihb/atmos_energy_billing_phone_number.pdfIn PDF document text
    • https://lenexemumuvag.weebly.com/uploads/1/3/1/4/131438583/pipem_labim_tilunutobodo_larexekogevil.pdfIn PDF document text
    • https://xalitizamer.weebly.com/uploads/1/3/4/8/134863297/viduv.pdfIn PDF document text
    • https://cdn.sqhk.co/fidumugovoz/Pihd3gg/mods_minecraft_1._7._10_mutants.pdfIn PDF document text
    • https://keminugugenoxag.weebly.com/uploads/1/3/4/3/134321568/206274.pdfIn PDF document text
    • https://biziremidawa.weebly.com/uploads/1/3/5/3/135397591/junonukaxevujo.pdfIn PDF document text
    • https://cdn.sqhk.co/gadewekunel/TNprjcT/smashbox_mascara_super_fan.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://berifukozek.rf.gd/bascule_jk_table_de_vrit.pdfIn PDF document text
    • http://memegimowa.epizy.com/335i_auto_to_manual_conversion.pdfIn PDF document text
    • https://s3.amazonaws.com/gagagakigibapo/hua_bechain_pehli_baar_song_audio.pdfIn PDF document text
    • https://s3.amazonaws.com/fusidejebi/14088635049.pdfIn PDF document text
    • http://jetelusaxidu.epizy.com/microsoft_configuration_analyzer_tool.pdfIn PDF document text
    • http://fodakobenolam.rf.gd/42622813844.pdfIn PDF document text
    • https://s3.amazonaws.com/xoguwavosuje/13313343867.pdfIn PDF document text
    • http://lubuzasoxevixan.epizy.com/chennai_gana_video_song_hd.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_off0000c3fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3FE 5552 bytes
SHA-256: 073f627cf4ecda87821b901562d8912b5c62ee60e1068b6635ade0e971e19bdf
font_01_sfnt_off0000d6e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6E9 11004 bytes
SHA-256: d4ebe57fe14bb3f35e0ed742bb419b3a6203901f799c2c7b0d550368d5cfbe41

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