Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7e0906b52fdf399…

MALICIOUS

PDF

81.6 KB Created: 2021-03-09 21:44:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 61e0b3e0904042f244e0e84461079659 SHA-1: b54bc422794e5293dee5e58645b916f5fdca68e1 SHA-256: e7e0906b52fdf399649cf43250c51d05a2aa6798ef5a246b0fb8c0c6eef44e35
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external links, many hosted on disposable domains, indicating it functions as a link farm. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. The document body, though heavily obfuscated, contains metadata related to 'wing chun dummy building plans' and the wkhtmltopdf application, suggesting a lure to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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 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.
  • 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://resalured.ru/strik?utm_term=wing+chun+dummy+building+plans PDF link annotation
    • https://cdn.sqhk.co/zujarepifej/0qdQOFd/paint_the_cube_review.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446270/normal_5ff42e6686909.pdfIn PDF document text
    • https://cdn.sqhk.co/wojeberupe/khaJER5/diversified_members_credit_union_customer_service_number.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386594/normal_5fc769081cdc7.pdfIn PDF document text
    • https://pewaruraxifazof.weebly.com/uploads/1/3/4/3/134340131/9319629.pdfIn PDF document text
    • https://giloxegikejuzun.weebly.com/uploads/1/3/4/7/134712531/rasogunagimuso_bosurumopeki_notudu_pomapi.pdfIn PDF document text
    • https://cdn.sqhk.co/juwafuzivega/bmieigf/92453146597.pdfIn PDF document text
    • https://cdn.sqhk.co/wemojezuvegi/gcthfge/extreme_landings_free_online.pdfIn PDF document text
    • https://cdn.sqhk.co/kajutizikodu/Khdjaii/goku_super_saiyan_dragon_battle_mod_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382773/normal_5ffef191c4556.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366050/normal_60477661063a2.pdfIn PDF document text
    • http://sutovuresas.mygamesonline.org/lazuregipaxuruwopufiwil.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416929/normal_5ff184bb51644.pdfIn PDF document text
    • https://cdn.sqhk.co/rezebarowed/hfghicB/home_design_3d_gold_free_download_pc.pdfIn PDF document text
    • http://kaboliwup.mypressonline.com/sat_review_courses_near_me.pdfIn PDF document text
    • http://jivusibofonefud.mygamesonline.org/what_does_the_judgement_card_mean_in_a_love_reading.pdfIn PDF document text
    • http://lokubakodo.getenjoyment.net/vevorunofaxemupalokaviw.pdfIn PDF document text
    • http://bafedudovodamo.medianewsonline.com/96815476234.pdfIn PDF document text
    • https://cdn.sqhk.co/reparepoki/Gv2jahh/motogp_bike_games.pdfIn PDF document text
    • http://wunadimizurened.medianewsonline.com/como_actualizar_gps_garmin_nuvi_1200.pdfIn PDF document text
    • https://cdn.sqhk.co/notenirikev/bE6jjib/aimpoint_compm5b_reticle.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1F6 3412 bytes
SHA-256: 3618c7c91584da51d8eafa47e96ffc25c3efd09e3a0de90a2a2b2a62fe52e831
font_01_sfnt_off0000fe38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE38 5644 bytes
SHA-256: fb0aca956726eca75cf95ff5e51200302390feacaa2cc0b51a78c398f49ff3ea
font_02_sfnt_off0001115b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1115B 11412 bytes
SHA-256: 39972b6e640c86bee68905346cb12ea096568c417e6288c5d100ace5e559d1aa