Malicious PDF — malware analysis report

Static analysis result for SHA-256 26068f5d09cab9a9…

MALICIOUS

PDF

85.7 KB Created: 2021-03-15 14:17:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 6f52ba8f199e60b6e1bf02d482871812 SHA-1: 9517d31263db4061acec44453db36c606d90c1a6 SHA-256: 26068f5d09cab9a9897a918b91ea1afedbc83a6a95eabcd44bc90b6b9a2aad95
134 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, and a heuristic indicating it's a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the presence of embedded URLs and the overall structure point towards an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://midufefew.ru/123?utm_term=canon+ip4500+service+manual+pdf PDF link annotation
    • https://vamalogobiw.weebly.com/uploads/1/3/4/6/134696595/bumojazasu.pdfIn PDF document text
    • http://zitirisiz.mywebcommunity.org/dutch_oven_chili_recipe_camping.pdfIn PDF document text
    • http://zumanidoxup.medianewsonline.com/xd_mp3_descargar_musica_gratis_para_celular_blackberry.pdfIn PDF document text
    • http://tamawasobo.sportsontheweb.net/area_and_perimeter_of_trapezoid_worksheet.pdfIn PDF document text
    • http://dapujabowigu.sportsontheweb.net/carmena_trial.pdfIn PDF document text
    • http://nasufulorejuwe.mywebcommunity.org/20022609918.pdfIn PDF document text
    • https://liloxowilobo.weebly.com/uploads/1/3/4/2/134265539/1109072.pdfIn PDF document text
    • http://sixesijilolun.mywebcommunity.org/delhi_road_map_with_distance.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/0294dba9-f75e-47bb-a109-bf3409fd0f4f/92728833526.pdfIn PDF document text
    • https://201a0bc5-0eb3-4135-8969-828875a6b07d.filesusr.com/ugd/607883_8e4aeb05870a4e5ea6d73e2a407419f2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nawosineromigi/89328063142.pdfIn PDF document text
    • http://peledopa.myartsonline.com/sat_subject_test_physics_online_practice.pdfIn PDF document text
    • http://madepadejatutof.onlinewebshop.net/11060224159.pdfIn PDF document text
    • https://ee67c5b3-b4d3-4257-b425-af55881d3a68.filesusr.com/ugd/c60da7_f29f0b6cf9ae479f9ce23f1cf1de0f28.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zukogi/sokosifiru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/414ffc1d-9bf3-4a51-946b-a3dc76f1502c/xewezodubutubeveruvawowo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e911df5d-8710-4f06-9774-d35a7941d63a/70543528964.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87e1dd75-5809-4939-9f5b-1fc41afc16a4/siminisolixojekabupaba.pdfIn PDF document text
    • https://d89a15f7-21b5-45f0-b9b4-bc5b7be68842.filesusr.com/ugd/18e821_a032696a6c9146b7ba50d3f58caca03f.pdf?index=trueIn 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_off0000fcb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCB0 3900 bytes
SHA-256: 9870515b3a8a998c745d267002888a17e92026d4399e04a5f93e7d3aff069621
font_01_sfnt_off00010a8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A8F 5620 bytes
SHA-256: eec955b1c0dab42c63817536a1baadf50ded87d5aaf705f7faf156e9864e8944
font_02_sfnt_off00011da4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DA4 13540 bytes
SHA-256: 1a9e585987885a4eb5db66d7c476cdb5770aa0c56261c88a861a199adf71122b

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