Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc94b7af3de4b7b7…

MALICIOUS

PDF

76.8 KB Created: 2021-02-28 09:39:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 4a67db486d24e7c4449c27cd7aa7eb48 SHA-1: 9f473e16109be66ffe57845db4b9ae49615f1859 SHA-256: fc94b7af3de4b7b7d1a3e8f3ccd5f4df88d34af9abe71327bc7278ce3ae4df56
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 is flagged by ClamAV as a phishing trojan. The ML classifier also strongly indicates maliciousness. The document body, though heavily obfuscated, contains text related to a 'Troy bilt tb110 carburetor repair kit', suggesting a lure to disguise malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://jumiwimov.ru/123?utm_term=troy+bilt+tb110+carburetor+repair+kit PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4426088/normal_6033c717720ca.pdfIn PDF document text
    • https://cdn.sqhk.co/vakolitakap/FkFhaij/54241700122.pdfIn PDF document text
    • http://xexogafuko.22web.org/gubefukuxeferosipetenas.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447258/normal_5fe5ecba4633c.pdfIn PDF document text
    • https://cdn.sqhk.co/mitejapeki/jh4SZgg/restaurant_story_vegan_stove_parts.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424646/normal_600395e5787c2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455406/normal_5ffe9b199656c.pdfIn PDF document text
    • https://cdn.sqhk.co/levowexesu/eThjT2J/54951386938.pdfIn PDF document text
    • http://krokoboko6.xyz/26696005252jpth.pdfIn PDF document text
    • http://instapriz.website/38357947935buc11.pdfIn PDF document text
    • http://a1metromovers.com/frise_chronologique_mouvements_artiscdgv0.pdfIn PDF document text
    • http://pristav.pro/bluecoat_proxy_tutorialqnlp0.pdfIn PDF document text
    • https://cdn.sqhk.co/vekudaselux/bFLicig/grand_theft_auto_iv_download_android.pdfIn PDF document text
    • https://cdn.sqhk.co/niwexifa/hbcji80/download_game_super_stickman_golf_2_mod_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479932/normal_5fe3980254a0b.pdfIn PDF document text
    • https://cdn.sqhk.co/buzovegom/heiggd9/hago_lite_apk_uptodown.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vipinib/12381182629.pdfIn PDF document text
    • http://zozikidifalov.epizy.com/crash_bandicoot_ps1_apk_for_android.pdfIn PDF document text
    • http://bitinorakinin.epizy.com/hollywood_movies_2019_new.pdfIn PDF document text
    • https://s3.amazonaws.com/luxaduzimase/coterminal_and_reference_angles_worksheet.pdfIn PDF document text
    • http://vazenuzowupol.rf.gd/hp_deskjet_2132_printer_troubleshooting.pdfIn PDF document text
    • https://s3.amazonaws.com/daselex/1h_gaming_music.pdfIn PDF document text
    • https://s3.amazonaws.com/degagaziv/pdf_to_word_converter_online_free_editable.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_off0000f17c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF17C 5200 bytes
SHA-256: 0d285b24a2929d2db8dfd7fac180d7a9b419d37dbf8af5efe6610833855ee7ae
font_01_sfnt_off00010347.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10347 10152 bytes
SHA-256: f08d1b3c307db9c3537d7248dd50924ebde924241f86d29d43b92244510587d8

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