Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7015961c0beead4…

MALICIOUS

PDF

82.4 KB Created: 2021-04-05 07:30:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 116fb6b3e7f32fc317c56809e6a12e9f SHA-1: 253b9841021a2cf32190f61f4d4c31c69d6342f8 SHA-256: d7015961c0beead40a9356c2d4ec53aab98e07a37ee692f3c888c1b579f6e0cb
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable hosting or suspicious domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, classifying it as a phishing trojan. While no scripts were directly extracted, the PDF structure and embedded URIs are indicative of a spearphishing attachment designed to redirect users to malicious sites.

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://zajinet.ru/strik?utm_term=prayer+of+jabez+song+lyrics PDF link annotation
    • http://samafutanub.mypressonline.com/sanetagitukigasinomakev.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://nawezupuzevise.epizy.com/lie_to_me_5sos_piano_sheet.pdfIn PDF document text
    • https://da18e6a8-d720-42de-a88c-3f13daad7efb.filesusr.com/ugd/08fe48_52998a8e38fc4baeb00b3f1509810b94.pdf?index=trueIn PDF document text
    • http://wogukakof.epizy.com/1810845969.pdfIn PDF document text
    • https://9c3086b9-336b-4a4d-b39c-975a2563a2e0.filesusr.com/ugd/f4f792_620d4ca11d104b6282c55759483e7afd.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/787b3aa5-1e02-4651-b5e1-a6f29e2b6044/81897040768.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d67ec8b-f676-49ed-9b56-9edd98da0f72/web_services_interview_questions_java.pdfIn PDF document text
    • http://juwozevukiri.rf.gd/chammak_challo_video_mp4.pdfIn PDF document text
    • https://f7927488-8152-43cb-a667-e231f58cc5c5.filesusr.com/ugd/950cc9_e01bbc3821db46ba9c93c35ac3963440.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4afd293d-031d-4abb-8aec-b2e1292c009c/how_to_calculate_margin_of_safety_pharmacology.pdfIn PDF document text
    • https://s3.amazonaws.com/tiniruru/eotech_512.a65_review.pdfIn PDF document text
    • http://zuvodokisezimim.rf.gd/72998795522.pdfIn PDF document text
    • http://siwemoxoxawevuv.atwebpages.com/58232411557.pdfIn PDF document text
    • https://e714dd98-3e42-4604-aba1-6d4b2506b1a8.filesusr.com/ugd/742965_99b3deacb9484b389f26b3821e4a2fc0.pdf?index=trueIn PDF document text
    • http://wufalejopasedor.epizy.com/pujilujavitezofe.pdfIn PDF document text
    • https://s3.amazonaws.com/zonebon/arduino_ethernet_shield_datasheet.pdfIn PDF document text
    • http://luvabokinoleg.onlinewebshop.net/tabuketibufu.pdfIn PDF document text
    • http://jabenesejamuji.rf.gd/does_apple_ipod_nano_7th_generation_have_bluetooth.pdfIn PDF document text
    • http://gixiluvigatekij.atwebpages.com/pre_algebra_worksheets_with_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f84546e2-f2c9-4d31-97cb-3dbddd980609/review_film_the_hunger_games_mockingjay_part_2.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_off0000f68e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF68E 5128 bytes
SHA-256: 1d2b53f9a79260603fd3377d26fdad52fa16c8a54c965a68f8c467bacdd3c727
font_01_sfnt_off00010816.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10816 11208 bytes
SHA-256: 0c1c09622ee411c264f2cf63df30ede4219f90b4562f7dcfdfa27ff0b3a58d2e
font_02_sfnt_off00012e3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E3E 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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