Malicious PDF — malware analysis report

Static analysis result for SHA-256 307148f714eefbe6…

MALICIOUS

PDF

70.3 KB Created: 2021-09-27 11:37:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a2639cee36e857958bd31602057e211c SHA-1: 02622ec92553420641c6e29be08dc32c29d48e31 SHA-256: 307148f714eefbe6afa21d130ce1006bcce53fdbf2c28de73c2d699b18bd8b19
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, with many URLs pointing to disposable hosting or compromised CMS upload directories. This suggests the PDF is designed to lure users to external sites, potentially for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 http://www.pro9apps.com/app/webroot/files/uploadimagesfile/pojosowovozalomeleg.pdf
    • http://sromedical.com/file_media/file_image/file/bojuboz.pdf
    • http://latiendasegura.com/contable_prueba/userfiles/file/rajeduvexi.pdf
    • http://lempreintedubois.fr/userfiles/lempreintedubois.fr/file/gizedadogotivorolamumavu.pdf
    • http://naasschoolofmotoring.com/fckeditor/userfiles/file/famexarolitogatadalitavu.pdf
    • http://icaalliance.org/filespath/files/20210916213557.pdf
    • http://yilbasipromosyonu.com/userfiles/file/binez.pdf
    • http://the-bom.kr/upfile/files/97475099165.pdf
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/16150c7718179f---35405361259.pdf
    • http://www.fan-consultants.com.tw/ezadmin/ckfinder/userfiles/files/begutizagupategefosuloxu.pdf
    • http://rioairporttransfer.com/ckfinder/userfiles/files/peguwipulo.pdf
    • https://iskoruma.com/upload/ckfinder/files/dekebesage.pdf
    • https://ecoquimica.cl/dinamicos/uploads/file/62849683582.pdf
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/r536q8kp98f41ishntjcnhpptp/bozewusinikufuzozovo.pdf
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/30d5c1d3eacb43d917dc2e8e836454e2/zujibifimukudibejuk.pdf
    • http://pm-ural.com/uploads/files/vinawofezuwadeguj.pdf
    • http://inannamsao.com/uploads/files/pijitewoxes.pdf
    • https://5703n1n6999-6a55.com/contents/files/kunolatoted.pdf
    • https://xuongkhopbadinh.vn/images/files/jigawesalavu.pdf
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/992c22oavr63590uc7rvrfdls7/tipegiximiruvo.pdf
    • https://raguvosbaldai.manovonia.lt/images/files/labegavetevelapimigefiruk.pdf
    • https://dagvandearchitectuur.be/_files/file/35920442745.pdf
    • http://kapfenberger-schuetzenverein.at/userfiles/file/sudogolep.pdf
    • http://xinyaoqiye.com/upload_fck/file/2021-9-9/20210909231406399820.pdf
    • https://tennis94.fr/img/pics/files/xumarediwad.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=menu+apk+download
    • 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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b37d.bin
417f97fdae1013c0e1bd714e10acf19beb76e38db774b1afcd6144a89f68a1a7
pdf-font-stream PDF embedded font (sfnt) at offset 0xB37D 10196 bytes
font_01_sfnt_off0000ca80.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xCA80 16792 bytes
font_02_sfnt_off0000e292.bin
dc31147e1d989c6378e62bca14d75ed1525db956c95048690802578af6aafecb
pdf-font-stream PDF embedded font (sfnt) at offset 0xE292 16096 bytes