Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce12dde886c7fa2e…

MALICIOUS

PDF

81.2 KB Created: 2021-07-01 14:28:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a5ff6ac8aa2961d6a229d05c6de342e3 SHA-1: ad31a4e0492625daaf6a97320ac61c4015674985 SHA-256: ce12dde886c7fa2e593bedb8537b00527e3e5b7aa9f83176fc5dd169c20e5bd2
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous external URIs and link farm patterns, suggesting it is designed to redirect users to potentially malicious websites. The presence of compromised CMS upload links further indicates a pattern of hosting malicious content on seemingly legitimate but compromised infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://inwebjor.ru/uplcv?utm_term=best+layout+of+town+hall+5
    • https://londonvipchauffeur.co.uk/wp-content/plugins/super-forms/uploads/php/files/b112e7770ef0a419c197e0d077880c71/kixiganari.pdf
    • https://onlinendttraining.net/files/42013796329.pdf
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c92dabd02c1---54077744222.pdf
    • http://influences-vegetales.eu/assets/Image//files/25716287487.pdf
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/ksc7ed7ni7gbhvsp1r0t2t1i1c/bogosikufifoxoduzinipitif.pdf
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608246d800b58---sonalipepukuzepalutu.pdf
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/a7e9b47fec747c41ea1418fd62ec97f7/2828832100.pdf
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160bb0af68a448---32332233790.pdf
    • https://www.electriclighting.com/wp-content/plugins/super-forms/uploads/php/files/d12ba1d1d297905ad8a7d09d5d87a426/jatoxivule.pdf
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/ljh2prk20rjrddvu4jf1v43tt9/32884616245.pdf
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/16076de6262a66---wovutil.pdf
    • http://healthywithhart.com/res/file/dowagofiwokeb.pdf
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d7115b5c684---xelaluniliwufudoz.pdf
    • https://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/sc9q4gvn85p7o9vcfkp7kn90i1/40947413798.pdf
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/mv296u7952f99v0i1nphgdd5a4/12981838764.pdf
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607275b64be62---44200331339.pdf
    • http://paillasse.hu/userfiles/file/73295459177.pdf
    • http://darec.sk/files/files/10361463651.pdf
    • http://www.alfapilates.pl/upload/file/rideniluvamibivoxevatun.pdf
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/494ef1a53fc219e98bfdd05ae6d99db3/28319834169.pdf
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbc69b06bee---26930515521.pdf
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/714f2248257181f74c6bd3899552491b/21999875396.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c88a914f765---67161495508.pdf
    • http://muszempilla.com/files/file/31142172824.pdf
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c929ea26c09---xetujegixoxisosesab.pdf
    • 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_off0000d904.bin
605ae61461dbfa7c8cf8abed06850b19f4a4bde5ad01045add3024e186676c85
pdf-font-stream PDF embedded font (sfnt) at offset 0xD904 17680 bytes
font_01_sfnt_off000106f3.bin
b2e96475119525043f0e0bc0a73614e71f6ab21379dd30f1110905510b3df4be
pdf-font-stream PDF embedded font (sfnt) at offset 0x106F3 10608 bytes
font_02_sfnt_off00011f5c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11F5C 16792 bytes