Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdaf43137e410489…

MALICIOUS

PDF

103.2 KB Created: 2021-07-09 12:08:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c57577a021bb0dcfd6ed6f6832dcdb38 SHA-1: 10f0e90cc57daf6e973fc5afdba0c2bc8630708c SHA-256: bdaf43137e410489f66fd15a9ee42d6e9713061be8316dd53ad9116b68a1d679
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ML classifier and ClamAV detection strongly indicate malicious intent. The PDF contains numerous links pointing to compromised WordPress upload storage and other disposable hosting, suggesting a link farm designed to redirect users to malicious sites. While no scripts were explicitly extracted, the PDF structure and link farm behavior are consistent with phishing or malware distribution lures.

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 http://imaginove.eu/data/Files/41230940833.pdf
    • http://aarogyamedico.com/userfiles/file/ramizapagirimizep.pdf
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/3kr8um8ktset4l79ddh4861510/xajinipi.pdf
    • http://www.colormotion.cz/UserFiles/file/gudofewut.pdf
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/4tlrmnoouqmd6g1pbl1oklj3h6/45354789586.pdf
    • http://agnieszkapawlik.com/userfiles/file/12367169400.pdf
    • http://allnatureint.com/userfiles/file/fobufojeloporir.pdf
    • http://wijnhuis-vaessen.nl/site/data/ws/files/33953126952.pdf
    • https://bczenekar.hu/files/file/xafojevinajusedefe.pdf
    • http://oryginalnedekoracje.pl/userfiles/file/wajenedawi.pdf
    • https://www.nrlandscapes.co.uk/wp-content/plugins/super-forms/uploads/php/files/8c331435c61c7a0cb04cb4c805794cca/miwatedexuzutanidam.pdf
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a6dceda176b---japasemupaburapisap.pdf
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/17ded0e5fbe5c4a55ba6153d51f88972/zisejubul.pdf
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/nc2a3j3q9hp0g3c2pq0q7tma5h/14999883050.pdf
    • http://4grd.com/cmsimages/file/fizuf.pdf
    • http://shlawllc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/78844249475.pdf
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086107fb0661---63342549563.pdf
    • http://smn68.com/clients/75339/File/xadidijobezezipilol.pdf
    • http://www.cddfct.com/up_files/file/genolefuxopinab.pdf
    • https://alsterparkett.de/wp-content/plugins/super-forms/uploads/php/files/59jb5goh766ir7pr83iv14s1at/favuwofaneke.pdf
    • https://driftwoodcc.com/userfiles/files/wibejuli.pdf
    • http://adance0112.com/upfile/editor/file/67073101555.pdf
    • http://busankid.com/webfiles/board/file///81275059997.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=need+of+watershed+management
    • 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_off000133a6.bin
7297c0a91f944db85562dcfec761a6314bc073cb3ebbd46601a857f95ee05477
pdf-font-stream PDF embedded font (sfnt) at offset 0x133A6 16736 bytes
font_01_sfnt_off00015f26.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x15F26 16792 bytes
font_02_sfnt_off0001773d.bin
b306ce45e4f0e15faa5d7ded3141511764dc464331f2dbfbf8eaf5dd3c499de8
pdf-font-stream PDF embedded font (sfnt) at offset 0x1773D 10728 bytes