Malicious PDF — malware analysis report

Static analysis result for SHA-256 c091ab46093c66c8…

MALICIOUS

PDF

79.9 KB Created: 2021-05-12 07:42:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 97447180027eacf4a750202388a48d99 SHA-1: b0972c245a479e1f5f8897ca5ab0cb42de7bae77 SHA-256: c091ab46093c66c8a71fd54be171222dd2c1a2ad00cd531a5769b0868c936184
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many pointing to disposable hosting and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, classifying it as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://baarspo.ru/strik?utm_term=how+to+draw+like+an+architect+for+beginners PDF link annotation
    • https://cdn.sqhk.co/zixagiko/Ujcgeid/rumegakoritisi.pdfIn PDF document text
    • http://faponabon.mygamesonline.org/how_to_write_a_good_review_for_your_doctor.pdfIn PDF document text
    • https://cdn.sqhk.co/rajexizeba/Wjjje77/dadezuvamekin.pdfIn PDF document text
    • http://serururepus.scienceontheweb.net/fulbright_scholarship_interview_questions_and_answers.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365525/normal_5fcfa3eabd36d.pdfIn PDF document text
    • https://cdn.sqhk.co/kasavakujosi/YrhjLzd/run_cow_run_game_free_download_for_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/xusarukave/jbvh9ge/17498234104.pdfIn PDF document text
    • http://kerufeki.22web.org/bird_box_book_reddit.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415061/normal_5fd98eddbda9b.pdfIn PDF document text
    • http://vuwefedope.sportsontheweb.net/zoxag.pdfIn PDF document text
    • http://bowifazalek.iblogger.org/malos_habitos_de_alimentacion.pdfIn PDF document text
    • http://bumomuvo.iblogger.org/mibubutinu.pdfIn PDF document text
    • http://zobebukore.22web.org/83044735173.pdfIn PDF document text
    • http://nubilofanekib.mygamesonline.org/9777266191.pdfIn PDF document text
    • http://juponuziwotaga.mywebcommunity.org/lc_oscillator.pdfIn PDF document text
    • http://pirojibanenuzi.getenjoyment.net/77902753476.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410986/normal_604b73b50c9b1.pdfIn PDF document text
    • http://toluvubub.mygamesonline.org/47847649734.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446915/normal_5fcca74f75c74.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460043/normal_5feb6fc82313a.pdfIn PDF document text
    • https://cdn.sqhk.co/sozonexof/jbigqig/zonokomi.pdfIn PDF document text
    • http://gemajesubon.22web.org/morelurisatudukomog.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sapokumafunu.epizy.com/how_to_descale_cuisinart_dual_coffee_maker.pdfIn PDF document text
    • http://zesubilav.epizy.com/9904084369.pdfIn PDF document text
    • http://fufinekudag.epizy.com/aashiqui_2_video_full_hd_song.pdfIn PDF document text
    • http://lidekajemunow.epizy.com/longman_dictionary_for_windows_8.pdfIn PDF document text
    • http://nebadutoputigit.rf.gd/dorinasemer.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_off0000fa67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA67 5540 bytes
SHA-256: 407163a1ca131d56bb8e76b9999a98cec2cbe451ac21f23cd5b3f9baa1367a3c
font_01_sfnt_off00010d4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D4A 10700 bytes
SHA-256: 8a77864790e5cc6e007213d9cf279dbc98ed1cac79274c28278b4dbdc893cd8a

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