Malicious PDF — malware analysis report

Static analysis result for SHA-256 24af8bf8ad8baafc…

MALICIOUS

PDF

128.1 KB Created: 2021-03-05 14:05:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 019fca55e1436a40202a8b217bcebdc3 SHA-1: c0dab6abef9f0d87df12d3edd8fe366ca7e15bd0 SHA-256: 24af8bf8ad8baafcfec615bc3890e3e5bfd79a8a9b4a923a5e5f25bd5ff747cd
126 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains, indicating a link farm designed to redirect users. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests this malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://leonvi.ru/wix?keyword=awesome+weapon+of+mass+destruction PDF link annotation
    • http://menbp.online/bmw_e30_bentley__service_manual.pdfst957.pdfIn PDF document text
    • http://itchia.space/bba_admission_form_2019_puneu89dn.pdfIn PDF document text
    • http://zuduwamani.mypressonline.com/40_laws_of_power_book.pdfIn PDF document text
    • http://123dutch.com/list_of_quantitative_data_analysis_softwaresmgha.pdfIn PDF document text
    • http://tikopariwoxa.mygamesonline.org/tixarafulonikasejibolulim.pdfIn PDF document text
    • http://kimujedat.mygamesonline.org/how_to_work_to_stop_human_trafficking.pdfIn PDF document text
    • http://sivelural.mygamesonline.org/gobimadazugetonupuwug.pdfIn PDF document text
    • http://bullbananavannaone.xyz/caperucita_roja_y_el_lobo_enamoradopmxpu.pdfIn PDF document text
    • http://nenonazuf.scienceontheweb.net/escape_from_mr._lemoncellos_library_show.pdfIn PDF document text
    • http://dostafood.xyz/kakebokadebazelesogovuraaf6.pdfIn PDF document text
    • http://lnstagram-copyright-confirms.com/barajuluwo3497r.pdfIn PDF document text
    • http://ruwemipuwev.mypressonline.com/how_much_money_does_a_mechanical_engineer_make_in_new_york.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kiboxanemez.rf.gd/ebitda_valuation_template.pdfIn PDF document text
    • https://3dbd840c-7861-42b4-b064-af52d1d2f4eb.filesusr.com/ugd/86319b_7ef94902578e49d4bbf60107178bfd2f.pdf?index=trueIn PDF document text
    • http://nakeviw.myartsonline.com/witebozino.pdfIn PDF document text
    • https://2d130471-2a64-48ba-87cf-8f1e86c6acad.filesusr.com/ugd/9c43ec_2d6756fe578d44bf90b7bb37db11abe2.pdf?index=trueIn PDF document text
    • http://pewaxoxepizus.rf.gd/burdah_file.pdfIn PDF document text
    • https://9ef77391-fdd1-48d8-ba15-364b07375333.filesusr.com/ugd/ebefdf_8916f520b88945e2b43332c38e238b6a.pdf?index=trueIn PDF document text
    • http://femodizabofowu.epizy.com/the_night_before_christmas_movie_actors.pdfIn PDF document text
    • http://besaware.epizy.com/dofolikewumesaferelon.pdfIn PDF document text
    • http://kitilogokufalu.atwebpages.com/boxirut.pdfIn PDF document text
    • https://2903667b-e544-4972-ac7f-e5855aaa9b37.filesusr.com/ugd/2cc660_791b85e471a34da58879f909f99d233d.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00019fa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19FA0 5348 bytes
SHA-256: ba82976911ac067879c069c7620e8cd45ec7f6a5a7eac737058d83477bcbdb92
font_01_sfnt_off0001b1c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B1C9 10716 bytes
SHA-256: 57f04fe8a6df90694ac1308da84c785edf1979327c1eb22f1a1785be7ea416d0
font_02_sfnt_off0001d6ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D6AD 17832 bytes
SHA-256: bdaadf18f0c69c07010cd9508c571cd90c3b8da2d8cf2067f6e3241d668097f4

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