Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ad2710f2a9318c6…

MALICIOUS

PDF

71.2 KB Created: 2021-03-19 21:57:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e01a93b0d2f7675f377c4dc7382a181b SHA-1: 233efa6e42192aa7debb1743160bc379839b26de SHA-256: 0ad2710f2a9318c6dc38d725b115e40c5e6c5f98f171fd23227cd7fabd2a244b
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are dynamically generated and point to PDF files, indicating a link farm or phishing attempt. The primary URL, https://nipisod.ru/strik?utm_term=how+do+you+reset+a+dyson+ball+vacuum, is presented as a search result, likely to trick users into clicking it. ClamAV also detected this file as Pdf.Phishing.Trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://nipisod.ru/strik?utm_term=how+do+you+reset+a+dyson+ball+vacuum
    • http://sogixusi.medianewsonline.com/cabala_portugues.pdf
    • http://konolux.medianewsonline.com/semejoxowizavotudopake.pdf
    • http://jinobuzid.scienceontheweb.net/axis_bank_tax_saver_fd_interest_rate_2020.pdf
    • http://nukapag.getenjoyment.net/the_game_show_season_4_episode_1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://vadimote.rf.gd/xiwokidijilijapofasuza.pdf
    • http://kedenutorufet.rf.gd/37932823354.pdf
    • https://s3.amazonaws.com/wewuxuviwar/coagulase_negative_staph_bacteremia_guidelines.pdf
    • https://uploads.strikinglycdn.com/files/e8bbe1ee-347c-447c-a2dd-0daf0a55274c/how_to_change_ink_on_hp_officejet_pro_8600.pdf
    • http://pakoxerevigere.epizy.com/dineda.pdf
    • https://s3.amazonaws.com/gotenukevepunin/deremigurajulivu.pdf
    • https://c301b42c-deab-4116-afcd-a09dd0728425.filesusr.com/ugd/4bb894_c652267e34ff4f32adc5431c879aee8e.pdf?index=true
    • https://s3.amazonaws.com/bededuxotulapil/how_to_tell_when_graco_car_seat_expires.pdf
    • https://769966b8-4adc-437e-bba8-f198cf6e171b.filesusr.com/ugd/41a0b6_6c255133cc92489cb574d63d6840438c.pdf?index=true
    • http://wugujub.onlinewebshop.net/tokyo_ghoul_re_call_to_exist_ps4_theme.pdf
    • https://s3.amazonaws.com/jodabiladezot/woges.pdf
    • https://9539e3d7-93ad-434a-85ac-22bd9bdb82bb.filesusr.com/ugd/df7b34_f8f3cb2dbef34589a6d7c5adc8251bd2.pdf?index=true
    • https://s3.amazonaws.com/dumupa/21434991218.pdf
    • https://s3.amazonaws.com/silubebebefuju/what_is_the_best_juicing_recipe_for_weight_loss.pdf
    • https://cdb53ace-3f3f-41e1-823e-0ecf3add8ba2.filesusr.com/ugd/47e9e0_797dbf38fe274b1f95066ca387a521bc.pdf?index=true
    • https://uploads.strikinglycdn.com/files/b6176ccf-cb3c-488d-9be7-72d62e13dddd/guwakaj.pdf
    • http://kuwukazisopof.rf.gd/autophagosome_formation_core_machinery_and_adaptations.pdf
    • https://5405d108-7f1e-482b-a10c-e06f62b7505d.filesusr.com/ugd/d941b1_cac9e13282ac4f898101f5b398f34bf6.pdf?index=true
    • https://s3.amazonaws.com/novipaliwid/barafoxepimubelufarenita.pdf
    • https://s3.amazonaws.com/liwara/tofudebupolonelox.pdf
    • https://uploads.strikinglycdn.com/files/90372ddf-f450-4a48-a776-46930735a133/zerisefeje.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000daab.bin
73cfd157d18b3d26407da0051ebcdc7a1c36feba19d7864d8430a4ad93a6464a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDAAB 5440 bytes
font_01_sfnt_off0000ed2c.bin
b1a657905f533e5d4394d90ad96adfbd62a1b3d7d2bcd52855e483669393c188		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED2C 9876 bytes

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