Malicious PDF — malware analysis report

Static analysis result for SHA-256 08bcdfff7881d1f3…

MALICIOUS

PDF

88.4 KB Created: 2021-04-03 20:18:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 3d413051c85009dd466b9320fb49fdda SHA-1: c7a3f20c41064a9fb90d0de389df266ed7aeddc7 SHA-256: 08bcdfff7881d1f3a2965305b07f4f83a787be5e3d40a9e1173d39d83af302a6
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs, with several pointing to disposable domains and potentially malicious content, suggesting a phishing or malware distribution lure. The presence of embedded URLs and the nature of the heuristics (link farm, external URI) strongly suggest an attempt to redirect the user to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://jumiwimov.ru/award?keyword=doctrine+of+hamartiology+pdf PDF link annotation
    • http://palikexifumalam.mywebcommunity.org/worasoluzesewaposidekoda.pdfIn PDF document text
    • http://pitikudefojeken.getenjoyment.net/6691505817.pdfIn PDF document text
    • http://ttttrrrr.space/is_red_face_a_sign_of_pregnancym43g7.pdfIn PDF document text
    • http://autokenn.com/beams_shear_force_and_bending_momentr4ktv.pdfIn PDF document text
    • https://cdn.sqhk.co/bikolazasir/yO5tngj/aluminium_6061_thermal_properties.pdfIn PDF document text
    • https://cdn.sqhk.co/baxotonad/jifResJ/ground_handling_jobs_melbourne_airport.pdfIn PDF document text
    • http://eyebrowthreadingdallastx.com/9-_6_word_problem_practice_dilations_answersyh307.pdfIn PDF document text
    • http://tehnikator.ru/xadifelovogupemuretowi1454u.pdfIn PDF document text
    • https://cdn.sqhk.co/jigavozef/afn9eij/vegovof.pdfIn PDF document text
    • http://jibakerutev.mypressonline.com/vojebuteketilugufitu.pdfIn PDF document text
    • http://rokuboxajiga.medianewsonline.com/gurojewefewoguvukiwajuw.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
    • https://77047a80-9f17-4504-a563-a097c25ca12e.filesusr.com/ugd/5c8b2f_91416c0243bc40f0b22458bfb185de4a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cb5d12d-fb19-41b9-8aa1-d62c1dfc7063/why_are_jersey_mikes_numbers_out_of_order.pdfIn PDF document text
    • https://51bf459c-6b46-41b0-863f-532cf8a77e0d.filesusr.com/ugd/2eedf1_95c3a40cfd474ca984525de33f229abf.pdf?index=trueIn PDF document text
    • https://bbaef297-c986-4b42-acb3-0fd65605e280.filesusr.com/ugd/e9fc71_4f6d32c9368643aea845f837f305a231.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb3fb8ab-b4b3-4040-9952-ac8986f80f7f/how_to_code_a_game_in_python.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89c586d7-790e-48c4-92b6-7c64531f0386/guwomufidesimuworasow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/855c3eff-30a3-4981-8bb0-b23ad05688e0/how_to_get_more_funding_for_nonprofit_organizations.pdfIn PDF document text
    • https://c6de0af5-2a4c-46da-924c-839bccb102c6.filesusr.com/ugd/5f1f0f_bdbd65a9269742558c3feef5f3571f2d.pdf?index=trueIn PDF document text
    • http://muvemaxadal.onlinewebshop.net/credit_risk_management_textbook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfb1f732-9c4f-46dd-8919-b0a41e0957e9/ejercicios_de_estadistica_inferencial.pdfIn PDF document text
    • https://72b50e20-f79f-40ca-96b4-24bef83e308f.filesusr.com/ugd/1a1092_2bf14f12bf824ba988166b1e012ad7e0.pdf?index=trueIn PDF document text
    • https://e1eccfe9-8888-4f52-a155-e9c8e84e0752.filesusr.com/ugd/4fb05f_45d88fa22c12488cbb5429666b3d34df.pdf?index=trueIn PDF document text
    • https://bf130ee1-1463-4c69-9604-1b23772ced92.filesusr.com/ugd/b4609a_375183eabae64600910287c7f09dd2b4.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_off00011016.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11016 5280 bytes
SHA-256: e90e378dd952ae0f9129726cec68735b37fabbe505d0dc4747640fc2c3b5e988
font_01_sfnt_off000121df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121DF 10512 bytes
SHA-256: 2f79c5810b68288976fa258430f9be4f009d4830a2b7bc96457db3cd2bcbff4d
font_02_sfnt_off000145d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145D2 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

Open this report in the interactive analyzer, or submit your own file for analysis.