Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d897fd409770fbb…

MALICIOUS

PDF

93.9 KB Created: 2021-03-11 06:14:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: e3a3f616513beeff8afb34e8597c5a1b SHA-1: 9141d8785a4f999d036d60d8a538c28112b8d686 SHA-256: 0d897fd409770fbbb04683ae4b767610e5c9bbed835b19097f32c7e1823d3987
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with several pointing to known malicious redirector infrastructure and disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious sites, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/123?utm_term=anhalteweg+formel+100+km+h In PDF document text
    • http://kakolamilasaru.medianewsonline.com/le_petit_prince_movie_french.pdfIn PDF document text
    • http://help-bluebadgecustomer.com/bukesatozididovekawaxkjoq9.pdfIn PDF document text
    • http://antonioita.fun/motuwozeminilizakujotuzozwb7xl.pdfIn PDF document text
    • http://hidver.com/wafosedinanipifik16wah.pdfIn PDF document text
    • http://movawizaxaxato.mywebcommunity.org/83145641244.pdfIn PDF document text
    • https://zakosolegim.weebly.com/uploads/1/3/5/3/135337695/zurarikanibafal.pdfIn PDF document text
    • http://serdyukov.pro/repair_addendum_form6348g.pdfIn PDF document text
    • https://fefejixoloxit.weebly.com/uploads/1/3/0/9/130969032/lubanap.pdfIn PDF document text
    • http://aov.one/tuwaxatipivudimagotiwosettvks.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/77340d62-faa0-4cdf-b9f9-3bd117d024c8/is_mathway_legit.pdfIn PDF document text
    • http://dojiseb.epizy.com/apps_programmieren_android_tutorial.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f9b0841-ef98-4994-803f-f95cef2611c1/you_can_now_play_cards_against_humanity_online_with_your_mates.pdfIn PDF document text
    • http://kadoxosin.atwebpages.com/ap_physics_electricity_and_magnetism_cheat_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/rumezo/zenurisidekibodozupenagam.pdfIn PDF document text
    • http://kafuxuf.epizy.com/muvarawekilonugezu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b493b30-eb22-475f-b6ce-f4c499214a5d/selenium_c_tutorial.pdfIn PDF document text
    • http://wexoragojanugen.epizy.com/how_many_calories_in_veggie_power_bowl_taco_bell.pdfIn PDF document text
    • https://s3.amazonaws.com/rimejiguvif/the_odyssey_book_13_questions_and_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec703040-9a28-4c30-9e6f-85dc4513fc13/principios_basicos_de_la_economia_de_movimientos.pdfIn PDF document text
    • http://mavoweba.epizy.com/72637803365.pdfIn PDF document text
    • http://dabixuri.rf.gd/woxedepozuxupijen.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00013876.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x13876 26456 bytes
SHA-256: b2f8bedfce86837fa929937732e47dba557a2bf0bb231e04b169a305e9b59e22
font_00_sfnt_off00010091.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10091 5340 bytes
SHA-256: 5a89acbd7eb100171c01022f82a6d699bc790a7855950d5dcb7d7bb62b73dd69
font_01_sfnt_off000112b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112B2 11272 bytes
SHA-256: d27928d08dbb2b72157e94b14d2a11fb82e667f40fee5c8d91279a4f92d6d885