Malicious PDF — malware analysis report

Static analysis result for SHA-256 30f101578f4dcd9d…

MALICIOUS

PDF

82.2 KB Created: 2021-04-18 08:44:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: a5123221e1ec0ae0d4c3b73dfbd48229 SHA-1: 8869f6511ba1f9f71e4edb7179301b631a5e17f2 SHA-256: 30f101578f4dcd9d7e6b96d2deed621a53654675603e485604c9a7e14c791354
226 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses an MFA/2FA-themed lure. 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 0.9950

Heuristics 7

  • 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 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.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://baarspo.ru/strik?utm_term=kitchenaid+superba+oven+door+replacement PDF link annotation
    • https://gewipilozu.weebly.com/uploads/1/3/0/7/130775211/getoxedutolapugot.pdfIn PDF document text
    • https://cdn.sqhk.co/levuzivanu/9ijghhj/music_events_barcelona_september_2020.pdfIn PDF document text
    • http://keepxufi.space/sizajorisimoxoxolanukoxon3pa5w.pdfIn PDF document text
    • https://vadiwolor.weebly.com/uploads/1/3/4/7/134737839/8965545.pdfIn PDF document text
    • https://muwamobole.weebly.com/uploads/1/3/4/3/134356931/0db7cdd05.pdfIn PDF document text
    • https://dujulofenali.weebly.com/uploads/1/3/4/5/134587776/6116595.pdfIn PDF document text
    • http://help-copyrighteamservice.com/ccna_routing_and_switching_2018dtcc7.pdfIn PDF document text
    • https://cdn.sqhk.co/midubevine/s3SDSge/89506905657.pdfIn PDF document text
    • https://cdn.sqhk.co/sunalikefazo/Nyelhf8/gudefojevedezo.pdfIn PDF document text
    • https://cdn.sqhk.co/jupujezaxa/iasVbja/pipisuposa.pdfIn PDF document text
    • https://cdn.sqhk.co/rufetuzek/Mljbjgf/bibirelukapexu.pdfIn PDF document text
    • http://wovoradomumakil.medianewsonline.com/36052415057.pdfIn PDF document text
    • http://davorivugexawu.sportsontheweb.net/magick_aleister_crowley.pdfIn PDF document text
    • https://gebezemimubitup.weebly.com/uploads/1/3/1/0/131070169/dd7b794b.pdfIn PDF document text
    • https://finazevad.weebly.com/uploads/1/3/0/7/130739247/jidowurizifewet_gojim_jofamiw_zifaso.pdfIn PDF document text
    • https://cdn.sqhk.co/fadanade/HidDggj/walking_dead_menace_crossword_clue.pdfIn PDF document text
    • http://ozalupa.space/crossfit_programming_free9g26c.pdfIn PDF document text
    • https://cdn.sqhk.co/xurazegoba/BA8ggii/78297291615.pdfIn PDF document text
    • https://cdn.sqhk.co/setanutoba/fjgibif/block_google_chrome.pdfIn PDF document text
    • http://sunugukumota.getenjoyment.net/xufan.pdfIn PDF document text
    • https://cdn.sqhk.co/zijatiki/CAjg9hd/president_simulator_full_version_mod_apk.pdfIn PDF document text
    • http://ketrovk.xyz/best_fingerpicking_guitarists_in_the_worldhh2wp.pdfIn PDF document text
    • http://eyebrowthreadingdallastx.com/fluval_fx5_filter_setupy5lrh.pdfIn PDF document text
    • https://cdn.sqhk.co/wakewafo/dlhggdk/46990629313.pdfIn PDF document text
    • https://xedububedopo.weebly.com/uploads/1/3/0/7/130740082/98627.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://suwuriru.onlinewebshop.net/tiwojaneninonofalu.pdfIn PDF document text
    • http://wesatume.atwebpages.com/21541603575.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f481.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF481 5364 bytes
SHA-256: f2d672d336aefbe9c5a314360cea0fc5117b71e0b860028829f73a12f6cd8203
font_01_sfnt_off00010680.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10680 11224 bytes
SHA-256: 5141b2c8af7247c398f5924251f3d568e96a3b04c887d2d522088bf33e2ffbb6
font_02_sfnt_off00012ca9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CA9 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361