Malicious PDF — malware analysis report

Static analysis result for SHA-256 9322c4459fe382b8…

MALICIOUS

PDF

95.6 KB Created: 2021-07-08 09:05:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e6a4b0149b5bbd5894d50b3377d47467 SHA-1: 1b0000ab7ca08f8fc1ec37ab338b07d7e08e475c SHA-256: 9322c4459fe382b8541257bac03e04f8fa711119e3978280c077c06b7034ef2f
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and a high ML score. It contains numerous links pointing to compromised CMS upload storage and disposable hosting, suggesting it functions as a link farm for phishing or malware distribution. The document body is heavily obfuscated and unreadable, providing no further context on its specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9918

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://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/5c3d813e3c1a9308144bcf46ac885439/zexivuwuliduwexogatuz.pdf
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089f0298a04e---67717226704.pdf
    • http://xn--80ab1a9a.xn--p1ai/sadm_files/10058359612.pdf
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/c4c442793d476e2ac7e413336855f04b/kiberikupibatelatawefano.pdf
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/8f62d1e4b4aa985db0108f0b7dfaf1f9/pujowadawidomo.pdf
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/160aae70ba791c---73678801538.pdf
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/9vlf20nmhpjn9mcthp5109ro74/zujakuve.pdf
    • https://afayl.com/userfiles/file/21489071474.pdf
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/98d4ef3ac82e8cbfe8ebdd4589697cee/99900310348.pdf
    • https://agenciaboom.com/wp-content/plugins/super-forms/uploads/php/files/t8jc71bjebc6nuldv6pgd48u90/27938695550.pdf
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/80aaa8b4eef4c017b4d0d16f0734fa22/muzegegofedizoxupe.pdf
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ac69b858fa---8131453271.pdf
    • http://biosite.ru/images/news/file/87973026394.pdf
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160767d87373bd---dovobozinuwatonepedow.pdf
    • https://digireg.it/upload/62255382017.pdf
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/894d368018e2ebb1fadb2f1570b10734/vivipepeterexotuwab.pdf
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/9f027431c332f56d0ef74131901f9a60/55137441844.pdf
    • https://kalyna.ua/sites/default/files/userfiles/file/9295319833.pdf
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/16082def34690f---litomanabujogejedar.pdf
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/a96bd2298052041eefb20229d7890699/83315484957.pdf
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/a6a200217a6e111a673c8647817b8b22/51831495485.pdf
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/ec052b12909cbdef1aa739d22df275a7/susuposoxajipa.pdf
    • http://tokyoracing.hu/userfiles/file/dumirumusigejaxujineka.pdf
    • https://skyzoan.com/cake/beta/userfiles/file/14510960819.pdf
    • https://golf-tout-terrain.com/publish/page/file/kivegadikalokuradipaluvi.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=ionic+substance+properties
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f962.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF962 16792 bytes
font_01_sfnt_off00011179.bin
d3db8d4085b93fb78469ac24f131aa615a6eb70e472377559aae2fbe2cd7d749
pdf-font-stream PDF embedded font (sfnt) at offset 0x11179 10512 bytes
font_02_sfnt_off00012953.bin
205a82feabe0d241a8dff9343c0e3dc9c054a57a6953a707af0c47b1cbaf1515
pdf-font-stream PDF embedded font (sfnt) at offset 0x12953 16832 bytes
font_03_sfnt_off0001412f.bin
262f92c4441a7b3b0e1a21e741e13141eac51c03557436d0450889c42f0cd379
pdf-font-stream PDF embedded font (sfnt) at offset 0x1412F 17572 bytes