Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7c328735c865a33…

MALICIOUS

PDF

91.9 KB Created: 2021-04-12 02:25:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ea8a1194527a1fe0359c7b00fec73aba SHA-1: debdc7b19ba2787c331a01db46c3d36c61244594 SHA-256: d7c328735c865a3350b028c8325fa15a08c70a9472570f10bcc1e64b5bc980a4
156 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified as a 'link farm', suggesting an attempt to manipulate search engine results or direct users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to lead users to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://seumenha.ru/strik?utm_term=samuel+beckett+endgame+movie
    • https://cdn.sqhk.co/xasexuwosul/ehehgig/download_fast_save_for_instagram_apkpure.pdf
    • https://gozetosudoz.weebly.com/uploads/1/3/4/6/134601595/begenokagupalo.pdf
    • https://movalibixijol.weebly.com/uploads/1/3/2/6/132682530/kuxomow_xulonur_levotaginobaz_xanatopaz.pdf
    • https://zegekeli.weebly.com/uploads/1/3/4/6/134616407/fajolenej-befubekoro-pevalit-zarulabozeki.pdf
    • https://cdn.sqhk.co/femogefuv/dgeMlno/redecor_home_design_game_review.pdf
    • https://cdn-cms.f-static.net/uploads/4372982/normal_602b80131ef0f.pdf
    • https://cdn.sqhk.co/bumegukomuza/BEgcgj6/subitazisav.pdf
    • https://tekevifumufov.weebly.com/uploads/1/3/0/7/130739519/92e7ce6b6bdb.pdf
    • https://gawujura.weebly.com/uploads/1/3/5/3/135325150/de88df170c7d0.pdf
    • https://lividuxu.weebly.com/uploads/1/3/4/3/134354071/jijakutilavip-razikigopavu-xefizaka.pdf
    • http://autolombardpro.ru/is_inkscape_better_than_illustrator1vmho.pdf
    • http://newberginvestmentproperty.com/soccer_world_cup_qualifying_results_europerjoog.pdf
    • http://qqkaxes.xyz/asigurare_auto_anglia1zvth.pdf
    • https://cdn-cms.f-static.net/uploads/4477655/normal_5fd60e318c0f7.pdf
    • https://cdn.sqhk.co/nevupediwix/jdhjih4/papefu.pdf
    • https://cdn-cms.f-static.net/uploads/4384817/normal_600ea42347825.pdf
    • http://canonsburglake.org/que_significa_ayuntamiento_en_la_biblia1gqib.pdf
    • http://greatmasters.biz/popuwixiosvme.pdf
    • https://xudutufatixoli.weebly.com/uploads/1/3/5/9/135957433/viwaw.pdf
    • https://cdn.sqhk.co/notenirikev/ses0idj/bacteriologia_y_virologia_veterinaria_merchant_gratis.pdf
    • https://jileninaniwepuz.weebly.com/uploads/1/3/4/7/134771173/0cc78da624900.pdf
    • https://mukuriwubi.weebly.com/uploads/1/3/1/4/131483253/sovetepad-sugivivugu-zaxenagixixo-vurekazawozoro.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://nixivirevoso.rf.gd/asvab_prep_plus_kaplan.pdf
    • http://kafuxuf.epizy.com/80268474753.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011b90.bin
e89e7a3b9d8f023766ef8fa07d6e1545ae4bba63fac0fb811a44e58b53b99401		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11B90 5236 bytes
font_01_sfnt_off00012d47.bin
84d39e7e349a49bf6d2c9de5602675ba776e08214b670368ff6bcaf1856be3f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12D47 10784 bytes
font_02_sfnt_off00015230.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15230 4324 bytes

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