Malicious PDF — malware analysis report

Static analysis result for SHA-256 1066bb430b2253e0…

MALICIOUS

PDF

89.3 KB Created: 2021-07-28 06:16:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 549dd6ba4dffb6b18c3f6cdccffb7f4b SHA-1: ac56286177942747f510a555d43ed1a6f67b3d48 SHA-256: 1066bb430b2253e0bba831b15aa89a7ccc4122a010ab0a364682e53b4a66091e
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The document functions as a link farm, directing users to various potentially compromised websites, including one hosted on eduomania.com. The presence of numerous links on disposable or compromised hosting suggests an attempt to distribute malicious content or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://arci-mp.fr/admin/File/kewirojedapul.pdf
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/6261b97603f12af1c9b3ffc5f9fb4815/99847570370.pdf
    • https://shayangroup.net/wp-content/plugins/super-forms/uploads/php/files/f6ee422d443649ced16714babef794e9/30150964598.pdf
    • http://bbfrontedelmare.com/userfiles/files/73175338497.pdf
    • https://pielinks.com/UserFiles/file/90704323939.pdf
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160984050d32bf---56107991970.pdf
    • http://infunplastic.com/d/files/dadejebivujafijugomubebi.pdf
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072ac274611b---lewenogipijegamizajowota.pdf
    • https://instalacje-elektryczne.net/ckfinder/userfiles/files/wagizurexarelatoziru.pdf
    • http://emanuelarombiarchitetto.eu/userfiles/files/vimekokajasututej.pdf
    • https://divinesacredshakti.com/wp-content/plugins/super-forms/uploads/php/files/cbb6926471e2a96f7ce0eb4aeeb5ffff/9501540937.pdf
    • http://boothbayharborshipyard.com/userfiles/file/refatofasitemadinikig.pdf
    • https://pharma-tools.eu/galeria/file/29809844123.pdf
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/ha51l22od362qpq6an3j6ktakv/kutulux.pdf
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/bae2c8abc2d7931b823925bdc0213bd3/vumerovemomelobadojubukaw.pdf
    • http://stavebnevyrobky.sk/www/upload/files/35670593268.pdf
    • https://kottayammedicalcollege.org/CMS/ckfinder/userfiles/files/xuwejuda.pdf
    • http://wittlich-luexem.de/userfiles/file/zegowobapevudevuvuraxe.pdf
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160757d6095852---xodogupixijetu.pdf
    • http://progfin.pl/userfiles/file/85583964776.pdf
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/gco4sigtl0b564n5a2jnii7fv6/nubixitibuv.pdf
    • http://ridgefieldpark1967.com/clients/3/39/39eebdc8797e30ee23d4fd57d071fd44/File/gutewe.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=restaurant+story+2+mod+apk+unlimited+money
    • 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_off0000f937.bin
0a9bad26985704ac794ed4a26bd4abe79ce7ea1a424e85b11c27d944b7e03082
pdf-font-stream PDF embedded font (sfnt) at offset 0xF937 16924 bytes
font_01_sfnt_off00012569.bin
4604c88dfd2af9c2086602564ffe9b2d0175403d91e790c236280f5907c14043
pdf-font-stream PDF embedded font (sfnt) at offset 0x12569 11024 bytes
font_02_sfnt_off00013f1d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13F1D 16792 bytes