Malicious PDF — malware analysis report

Static analysis result for SHA-256 d56e08ca182f9b8a…

MALICIOUS

PDF

88.0 KB Created: 2021-07-02 21:56:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: dbbce5ae060671befa17db7a65d7976d SHA-1: ea4fdfca19025ec7d59f190c3c31050fcf7c44a0 SHA-256: d56e08ca182f9b8af4bb890b712f9c4f42a2e2932a7be1cea0eb173debdf0701
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of links, many pointing to compromised CMS uploads and disposable hosting, indicating a link farm designed to redirect users to potentially malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 https://store-connector.com/_upload_bilder/_filemanager/file/87540871438.pdf
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160869f809b5a3---riragokewamoke.pdf
    • http://catherine-massage.com/ckfinder/userfiles/files/66953712355.pdf
    • http://hilltop1976.com/clients/24685/File/futubonofanugemaxo.pdf
    • http://fgosvo.ru/files/files/11066108509.pdf
    • https://hagabb.ro/ckfinder/userfiles/files/640955369.pdf
    • http://www.startservis.sk/novy/ckfinder/userfiles/files/8351226429.pdf
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609c7788544f8---42963482600.pdf
    • http://jkohut.pl/file/nagedu.pdf
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/a30bc13f27195f9c90d7fee056a2bded/makedave.pdf
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16072f36dd8484---laguzirotosuzuxanamuga.pdf
    • http://nfrostov.ru/upload/files/gimawoso.pdf
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16090c7322e27f---52815171232.pdf
    • https://govox.co.uk/wp-content/plugins/super-forms/uploads/php/files/u446ek2vohvqv1k82kqm1mhql2/81599917548.pdf
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/27367fd79104bdd39e1b450703184338/49710932440.pdf
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c339be13f20---74518877103.pdf
    • https://castilloexterior.org/ckfinder/userfiles/files/71376862166.pdf
    • http://mamnonlittlesun.com/upload/files/27444242840.pdf
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b9def8527b---89114434959.pdf
    • http://accessprecision.com/userfiles/file/44526827062.pdf
    • http://klefmarken.se/upload/file/51709954696.pdf
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/4d2877fc0da81e3f1496cb242569f3c4/fojakaxitojufitapop.pdf
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160728088bbf3c---11023599285.pdf
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/16075ccb317494---bajobazokukunibagi.pdf
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/896335b57c4425484a4b1f11fa19114e/nuretaxevopudunisume.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=hand+in+sentence
    • 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_off0000f891.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF891 16792 bytes
font_01_sfnt_off000110a3.bin
1675c7d13b9bc2b6c732339f6636cac6849d1c9df80f6bf7952928a4b212b283
pdf-font-stream PDF embedded font (sfnt) at offset 0x110A3 16736 bytes
font_02_sfnt_off00013c47.bin
2cce852e2d5ae2c52232247bc23f7575a7c202ae8256f64ab817d11ce8a84485
pdf-font-stream PDF embedded font (sfnt) at offset 0x13C47 10088 bytes