Malicious PDF — malware analysis report

Static analysis result for SHA-256 a612c05fa59db79e…

MALICIOUS

PDF

77.6 KB Created: 2021-03-15 07:12:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f8048685eb161a98242b25f99e1bafb1 SHA-1: de46df74fe9e55db43ce4a65c67850d84b24cc80 SHA-256: a612c05fa59db79ec3d546f7b374fe20dd6e5ce3c7a21c57abefa6a2ed0bcba5
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains a large number of external links, suggesting a link farm or phishing attempt. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic indicate an attempt to redirect users to potentially malicious or deceptive websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://maypoin.ru/wix?keyword=pro+keto+rx+uk
    • https://cdn.sqhk.co/texivewa/eaWhiFz/mobile_legends_idle_cd_key.pdf
    • https://cdn.sqhk.co/damukowabij/h1jaPTd/meetme_app_not_working.pdf
    • https://cdn.sqhk.co/gobenebovi/aUhahh4/gilazanumimurivoku.pdf
    • https://giwemonuxir.weebly.com/uploads/1/3/0/7/130775654/lubogopog.pdf
    • https://zaxadumumuguxe.weebly.com/uploads/1/3/1/4/131454216/8b444fadd5892.pdf
    • https://cdn.sqhk.co/xenekifa/jgoiigc/xikakozuxerixabuvewel.pdf
    • https://wemodolitafuroj.weebly.com/uploads/1/3/6/0/136055174/xekexike-lowegusidemub.pdf
    • https://tazateniko.weebly.com/uploads/1/3/4/8/134885152/vofevexuduxile_lenatobi.pdf
    • https://rizomoxus.weebly.com/uploads/1/3/4/5/134589692/femamip-samik-rutofubujabaxel-fubafuvuzaw.pdf
    • https://cdn.sqhk.co/bufutoje/heZlggF/31121375257.pdf
    • https://cdn.sqhk.co/mozopojugode/Kuhdd2w/bukefitixu.pdf
    • https://cdn.sqhk.co/vedasukuki/Zuidiji/sepugaladajun.pdf
    • https://cdn.sqhk.co/gukomoluda/i21hggc/sivafot.pdf
    • https://cdn.sqhk.co/gabixeme/hhibpTw/pappu_tempo_wala_cartoon.pdf
    • https://lujotasapamuxa.weebly.com/uploads/1/3/0/9/130969194/redubisaturuvedo.pdf
    • https://pexasuwen.weebly.com/uploads/1/3/4/5/134593650/lupofaziresosa-nibarujufe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/widuxade/75756476728.pdf
    • https://uploads.strikinglycdn.com/files/bdc4f1da-f044-4b24-a288-2d315a4468d0/humphrey_visual_field_analysis.pdf
    • https://uploads.strikinglycdn.com/files/4735ae27-7995-449b-85cf-91c805c0d6d3/don_juan_demarco_soundtrack.pdf
    • https://uploads.strikinglycdn.com/files/cac96aeb-7a52-49a8-a4f0-739e87434acd/lotexonujiwo.pdf
    • https://s3.amazonaws.com/tomamujuf/mineporelevevojo.pdf
    • https://s3.amazonaws.com/lumixi/figleaves_bra_fitting_guide.pdf
    • https://s3.amazonaws.com/lanaladu/d_d_3._5_druid_spell_sheet.pdf
    • https://s3.amazonaws.com/dazinibonofobi/can_i_use_instant_pot_recipes_in_my_crock_pot_express.pdf
    • https://uploads.strikinglycdn.com/files/0737c74d-a487-4fc4-8cba-0617b3fa26b9/on_writing_a_memoir_of_the_craft_review.pdf
    • https://uploads.strikinglycdn.com/files/d81bc3fe-0762-4cca-a0be-e107110ea7e6/58350909225.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f67d.bin
6f2db4bd75976a809dfa1e9845e00e726c4f62923aa93b5732ab838011cb3142		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF67D 4392 bytes
font_01_sfnt_off0001057f.bin
92a4d9bb96b82cd77df262648d988ebfa15e775e4242d9a8bdc9cdacbb9874d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1057F 10440 bytes

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