Malicious PDF — malware analysis report

Static analysis result for SHA-256 d69bec7bda4c08dd…

MALICIOUS

PDF

85.2 KB Created: 2021-09-01 04:53:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 980f470c4a4464d5b7e98032f856765d SHA-1: 1ac047227ad5f8b12672d02df4a30c4d63cff7c9 SHA-256: d69bec7bda4c08dd26efabd590606a74bcfd0177af5afab5ca53b9e8f5b546ad
156 Risk Score

Malware Insights

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

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 numerous URLs pointing to compromised WordPress upload directories. These links likely serve as lures for phishing or to distribute further malware. The document body is unreadable, but the presence of multiple compromised CMS upload links is a strong indicator of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080324c8e8b6---fikabulubi.pdf In PDF document text
    • http://koszyczarek.pl/userfiles/file/67293850827.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c27e05ab9a5---jedab.pdfIn PDF document text
    • http://ivepe-elearning.gr/assets/UserFiles/mainHome/file/12865343714.pdfIn PDF document text
    • http://englishkan.net/UserFiles/File/xeguxedupapifivetux.pdfIn PDF document text
    • http://lafenicealcamo.it/userfiles/files/81267992092.pdfIn PDF document text
    • http://altaprecision.com/userfiles/file/febenoda.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/bc8c8a64ff429c7632f2555340884a72/jadudoligije.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a2ae862a973---64304823618.pdfIn PDF document text
    • http://microcement.ua/userfiles/file/64941696758.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160816268e7326---83780514473.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab07fadf184---wadesiv.pdfIn PDF document text
    • https://gulf-rope.com/images/bulk_images/files/35033079483.pdfIn PDF document text
    • http://joelcsimonesq.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/pugorepebelizegali.pdfIn PDF document text
    • http://helderlive.nl/ckfinder/userfiles/files/fiwiviworikirago.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c4a18b27104---23929569762.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/d9qgbtm5rkj1udmdn0o7jf4ht3/xenit.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160893d52a5c29---78617693409.pdfIn PDF document text
    • http://www.deco-interieure.com/userfiles/file/vopuwoxinurobitaw.pdfIn PDF document text
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/02726ca628f5eea8902854b081a8d33a/dapomoketuguxobolasitip.pdfIn PDF document text
    • http://studioguatta.it/userfiles/files/zujute.pdfIn PDF document text
    • https://shopabrang.com/images/files/jurizozejogat.pdfIn PDF document text
    • http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1610ea45e3bda2---dabimijera.pdfIn PDF document text
    • https://bnovum.hu/downloads/puvowuxizupovopovimigamu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=google+expeditions+lesson+plansPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7FF 10608 bytes
SHA-256: 20a427e11831a85de6f0608013558b96302f24df7fd83eeb3e9c7bb787371ba3
font_01_sfnt_off00010032.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10032 17592 bytes
SHA-256: 510f5bca1932c2bd74333dbc8af5b3f7e82e85a12a100b1345f070f716355999
font_02_sfnt_off00012e2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E2C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1