Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a2062686fda3647…

MALICIOUS

PDF

70.5 KB Created: 2021-03-02 15:04:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: ea54afc40f50d0aa87249c7f064c6687 SHA-1: 707050502a5dc146a08ab4bd1d77cf427db9d466 SHA-256: 2a2062686fda36471599a58ecc1a46a170209154627b8e56cf4517a143268d0d
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable domains and are likely used for phishing or to host malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains fragments suggesting a commercial product, which is a common lure for phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://xajibur.ru/123?utm_term=commercial+cool+12+000+btu+window+air+conditioner PDF link annotation
    • http://xapefefulonexir.22web.org/35543089229.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467577/normal_600ab3846c779.pdfIn PDF document text
    • https://cdn.sqhk.co/letinumi/FhhGsnj/delete_jango_radio_station.pdfIn PDF document text
    • http://usacarins.com/rotebowayyj08.pdfIn PDF document text
    • http://moymagazin.xyz/613672332878bj30.pdfIn PDF document text
    • https://cdn.sqhk.co/dodalowogiv/djanFgg/bumeporisabefu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393752/normal_602cdceedb3c9.pdfIn PDF document text
    • https://cdn.sqhk.co/buxifuludo/WjiNhjh/e_wallet_account_number.pdfIn PDF document text
    • https://cdn.sqhk.co/zifiguwosu/KhbVja7/nixekeluzebanegixufu.pdfIn PDF document text
    • https://cdn.sqhk.co/xoguvamev/WPzheOh/kasegokerijiru.pdfIn PDF document text
    • https://cdn.sqhk.co/takejirasomu/gYgcmNB/45873352720.pdfIn PDF document text
    • https://cdn.sqhk.co/nuvaratuji/lhhxQX4/zombie_apocalypse_guns.pdfIn PDF document text
    • https://cdn.sqhk.co/tefazaturar/ijkxKhh/knock_down_the_house_rotten_tomatoes_audience_score.pdfIn PDF document text
    • https://cdn.sqhk.co/nobixapo/emTjaJm/angry_birds_star_wars.pdfIn PDF document text
    • http://pet-guru.shop/construction_safety_program_sampleri618.pdfIn PDF document text
    • http://meetchat.space/departure_tv_series_episode_guidenz0bw.pdfIn PDF document text
    • https://cdn.sqhk.co/detaludolef/latfOha/weteradexoborowinatenor.pdfIn PDF document text
    • https://cdn.sqhk.co/nexasolonit/RM4iirt/jump_on_it_song_lyrics_sugar_hill.pdfIn PDF document text
    • http://hotloveme.online/prefix_and_suffix_worksheets_grade_4hmcz4.pdfIn PDF document text
    • https://cdn.sqhk.co/fakujodi/TJie2Wc/95891952649.pdfIn PDF document text
    • https://cdn.sqhk.co/nezusoxe/Cgijjjb/make_a_christmas_list_online.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d710.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD710 5372 bytes
SHA-256: da150d3d2544c7cc0d35ab3b82f6bcfa51a179a91c7ca6c8c32be014e67301bb
font_01_sfnt_off0000e946.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE946 10336 bytes
SHA-256: ad7270e8c9163503fd34b1c044b4667bef667da50f78f6c18902a534e0a18b86

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