Malicious PDF — malware analysis report

Static analysis result for SHA-256 a675fd0b2915139f…

MALICIOUS

PDF

84.7 KB Created: 2021-03-16 16:47:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f8249bd6143d0d09679d3b2b475c2063 SHA-1: a362ae362b17412e5be918d4b2fdc4a9a6779e42 SHA-256: a675fd0b2915139ffed819652f462b3fa009dd6df2bd9173807659ca3971d8b6
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a PDF link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or SEO manipulation. While no scripts were explicitly extracted, the PDF structure and numerous external URLs suggest it's designed to redirect users to potentially malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://jacksth.ru/wix?keyword=alejandro+chaban+novia
    • https://kedixomavej.weebly.com/uploads/1/3/4/0/134017366/7259746.pdf
    • http://thiswaytovogue.com/bittorrent_pro_apk_full_versionoy7ef.pdf
    • https://cdn-cms.f-static.net/uploads/4465257/normal_5fd3b2ae19df1.pdf
    • http://universal-kirov.ru/fire_and_ice_ski_movie_trailereobdu.pdf
    • https://suxavumopej.weebly.com/uploads/1/3/3/9/133999634/fezijaxoke.pdf
    • https://cdn.sqhk.co/netimupoxojo/MP6eDjg/66755445412.pdf
    • https://dufowazana.weebly.com/uploads/1/3/4/5/134529111/174f906.pdf
    • https://zefinefan.weebly.com/uploads/1/3/2/8/132816158/9454783.pdf
    • https://cdn-cms.f-static.net/uploads/4416318/normal_6038ec13873da.pdf
    • https://xetasigebe.weebly.com/uploads/1/3/4/4/134443645/sujebelumapivutow.pdf
    • http://raisinshq.club/20853548413itodm.pdf
    • https://cdn.sqhk.co/dozirerom/dHb46WN/nhl_games_today_channels.pdf
    • http://trening-ekaterinodar.ru/asp.net_mvc_select_from_databasetc747.pdf
    • https://cdn.sqhk.co/fenazijeguk/heahcgd/26533919759.pdf
    • http://parkingtest.xyz/maya_2021_release_date2pbl5.pdf
    • https://winilogixibofop.weebly.com/uploads/1/3/1/4/131408061/koron.pdf
    • https://cdn-cms.f-static.net/uploads/4482218/normal_602f6f90e591f.pdf
    • https://luwupedo.weebly.com/uploads/1/3/1/3/131383743/1056048.pdf
    • https://zofetofevikid.weebly.com/uploads/1/3/4/3/134337570/tigobi_vozanetuli.pdf
    • https://jebezefekoju.weebly.com/uploads/1/3/4/7/134737834/wogabo_fobudawati.pdf
    • https://cdn.sqhk.co/lunilageruvu/fhhhjhh/fusionner_deux_sur_adobe_reader.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/gasodamuza/rolexarawagexadij.pdf
    • https://s3.amazonaws.com/kafises/vulafadidivodafujivot.pdf
    • https://s3.amazonaws.com/marimejerebo/placenta_previa_rcog_patient_information.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_off0000f3c6.bin
ae3f28b31f85f1790423eba29b602d1b5e1a8ba2219c018cf5125c9a949ef97a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3C6 5112 bytes
font_01_sfnt_off00010527.bin
6443c34c8d7ace1564b536edff383d45b180636ecaeafe237968be597576b71e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10527 6104 bytes
font_02_sfnt_off00011a91.bin
28f50568efcd100c92feab6581562a265ed2d8484cc259936b584cf02bf7d609		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11A91 12492 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.