Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc144aa97bd76bbd…

MALICIOUS

PDF

74.2 KB Created: 2021-03-07 16:55:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: eb54d8dd2c49cf70d91df27a6692dcfd SHA-1: 74c95c8f44f7eb558c858b3447542bcd7ac067c7 SHA-256: bc144aa97bd76bbdfaecaddc2b1788342b835f241ce65e42df781ebd44dee374
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://lozipotod.ru/wix?keyword=moviebox+apk+ipad PDF link annotation
    • http://cashbackk.site/xepesututubudinabh68nv.pdfIn PDF document text
    • https://cdn.sqhk.co/wimiwupo/ibibha8/flying_dragon_games_online_free.pdfIn PDF document text
    • http://avtoshkola-region26.ru/landis_gyr_e470_meter_manualvs5fb.pdfIn PDF document text
    • http://xruhdfo.site/16283617885wvy1u.pdfIn PDF document text
    • https://cdn.sqhk.co/niririga/fhbOhaR/xeremobefi.pdfIn PDF document text
    • http://galoomer.online/60123976937lq7yz.pdfIn PDF document text
    • https://cdn.sqhk.co/dewufidabo/mR9m3gh/46552981661.pdfIn PDF document text
    • http://handler-autoscout24.com/koxibulozowopapud6ifpp.pdfIn PDF document text
    • https://cdn.sqhk.co/vujenibolo/hjYQuhg/candy_fever_game_free_download.pdfIn PDF document text
    • http://ewop.space/gaweligutuvamilony0ua1.pdfIn PDF document text
    • https://cdn.sqhk.co/wepugozotap/7bgh8pK/41426821012.pdfIn PDF document text
    • http://werenntaq.online/8197369885821gjf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6ba8113a-99dc-4618-97bf-d7180f10ff72.filesusr.com/ugd/b6edda_8902ee8d194348a882eb41370e8d25e6.pdf?index=trueIn PDF document text
    • https://aa514bbb-a96e-4bc9-8ff3-0ca2edd1104f.filesusr.com/ugd/3fc21f_e65cb712e94440f2a8b0083231a40bc1.pdf?index=trueIn PDF document text
    • https://8d67285a-e3c5-4820-bb1a-bb91ce1079a6.filesusr.com/ugd/d54300_6e3ee35560ee4ebca9e3b7c07f443bab.pdf?index=trueIn PDF document text
    • https://d5e9a058-cbdc-4968-ba72-30cdbf1e36a3.filesusr.com/ugd/9cfd0a_4a952f3a4fb64f7c8e9c83ca8a7407d7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce13c752-8e5a-47ed-91a7-cbbfc363e239/would_be_best_synonym.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd0d05a1-8eb5-4aa4-aa30-120d0dfecf8d/behringer_xenyx_x2442_usb_manuale_italiano.pdfIn PDF document text
    • http://tedusola.epizy.com/how_to_use_garmin_etrex_30x.pdfIn PDF document text
    • http://japixunatavaxi.rf.gd/formal_dress_shops_around_me.pdfIn PDF document text
    • http://lotijedopedo.epizy.com/non_profit_organization_charter_template.pdfIn PDF document text
    • https://6c4ab87d-8e52-4a97-8c5d-a16208ca9625.filesusr.com/ugd/0bcf16_bb2e8fdcd9db4f3c8c0f1bbd5f8c879e.pdf?index=trueIn 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_off0000e43e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE43E 4984 bytes
SHA-256: f3bc5997155651f6e15db9f79b1f3eecb1980b10e3d673335e9265b4da29d5c5
font_01_sfnt_off0000f55d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF55D 10756 bytes
SHA-256: 3a240a42d05c82aa36add180dbf12e05fcc30fed23daec883d7cb39fc919a3cc

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