Malicious PDF — malware analysis report

Static analysis result for SHA-256 20475b5edec98581…

MALICIOUS

PDF

86.2 KB Created: 2021-03-08 00:44:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 00ee19a181aa182a5e65aa121cf28b14 SHA-1: 291b05fcf62a201966c8c2365765e4ae0c86c314 SHA-256: 20475b5edec98581b09afc31a1513f6cc0786aca43ce752e983f896e20b0c07f
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a primary one pointing to a site that appears to be a link farm for various documents, including an 'isuzu npr hd owners manual'. This suggests a phishing or malware distribution lure, masquerading as a helpful document. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or trojan delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://pelibifir.ru/wix?keyword=2014+isuzu+npr+hd+owners+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4447626/normal_5fd6fcab87562.pdfIn PDF document text
    • https://cdn.sqhk.co/sebutarukaw/jgjjajj/umc_emergency_room_el_paso_tx.pdfIn PDF document text
    • http://pycnidwzxc.info/3819500185992hy4.pdfIn PDF document text
    • http://trikolor.site/982757188368xmc2.pdfIn PDF document text
    • http://demejizato.22web.org/zujiluvijonujuvazokutasaf.pdfIn PDF document text
    • http://ttop-shop.com/82358596023t6754.pdfIn PDF document text
    • https://cdn.sqhk.co/pigevikuwi/jffo2gj/ball_hitch_for_cub_cadet_lawn_tractor.pdfIn PDF document text
    • https://cdn.sqhk.co/wuvitatutuv/gjLjddZ/20360676893.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408702/normal_602f45bf860e5.pdfIn PDF document text
    • http://jotipire.iblogger.org/tapisigonegabopuwuvo.pdfIn PDF document text
    • https://cdn.sqhk.co/laloropaki/dnll6Fm/kibuvoxebolejigiwebomiva.pdfIn PDF document text
    • http://copyrighthelpbusiness.net/7685457897447unc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501385/normal_5fdbe5c128f87.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403259/normal_5fdc0d109da65.pdfIn PDF document text
    • http://ueuniti.xyz/making_inferences_worksheetsopxi8.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/sesafefanulokam/bengali_baul_dj_mp4_song.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9d182c0-3c7c-41b7-aefd-4d148eba93d8/is_there_a_keto_diet_book.pdfIn PDF document text
    • https://s3.amazonaws.com/fokapikow/ford_mustang_mach_e.pdfIn PDF document text
    • https://s3.amazonaws.com/bededuxotulapil/77381865831.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5685e20-a75c-475a-87b8-6e35aeff0bd0/dimiviw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ef126bb-31c6-4c32-a3b4-04293d2959c8/alligood_nursing_theorists_and_their_work_9th_edition_free.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_off000108f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108F1 5660 bytes
SHA-256: ba704abd2276035104d1b4a01a207f5b5942af2617c7a58f600d4579384da8da
font_01_sfnt_off00011c26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C26 15316 bytes
SHA-256: 961566f196f0207e866be24dbc47c58e640453c5866687b6dc464c816dee7bb8

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