Malicious PDF — malware analysis report

Static analysis result for SHA-256 cabead0017c16257…

MALICIOUS

PDF

85.3 KB Created: 2021-07-16 16:28:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bed93b1a25a1d941af2f7585eaf626df SHA-1: f45bf1045ed1c0ee81f345faa96e4f0afbb03513 SHA-256: cabead0017c16257b122e7a2444d84506700190f4c2b801550a0b9fec61482c2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and embedded URLs point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://smidgel.ru/uplcv?utm_term=to+eat+healthy+or+healthily
    • https://xistenze.com/files/files/xagetev.pdf
    • http://mp-hd.de/data/aktualnosci_imgs/file/31139805672.pdf
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609c8f10e3041---dejejomalabupasozelogowe.pdf
    • https://www.gico.ge/ckfinder/userfiles/files/nixumebuvamejotesa.pdf
    • https://migger.dk/userimages/file/pagutuvoreturef.pdf
    • https://watfordfairtrade.org/app/webroot/img/files/melopixadugidi.pdf
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606f57b9d0ee8---12743093477.pdf
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609490ab82e8f---6333931089.pdf
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16089b2624f926---14482611675.pdf
    • http://hataylezzeti.com/resimler/files/29090195460.pdf
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/160746f2830c6f---xitifusuvavuni.pdf
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c63d0f0dd94---wupudulorofanuxegiji.pdf
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/4astg71jrlt232ojsca041pec8/tejevuwetakajokekozebana.pdf
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607f774187cc9---55205914778.pdf
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/687efff4383c71abd46288d19dd8b5c5/safapusepojopitinidiket.pdf
    • http://mcelvain2020reunion.com/clients/b/b5/b5167212b805812c9439186484f80f5e/File/14057779151.pdf
    • http://opalsolar.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16085f5d37c20b---15885777923.pdf
    • http://aaaexpressheating.com/userfiles/file/35541157280.pdf
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/19ef1f9f9e140787262e991a010b1086/wukejizewagijizugo.pdf
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160afc47ee3532---22682650037.pdf
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085c1fcc6c94---zupopazuvelidalatux.pdf
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a642b7f2af---jowajewuxeniwakijebom.pdf
    • http://bodymindspiritconnection.org/clients/5/53/53f1eac0d8ee32431a47b4e1af774f29/File/73287428476.pdf
    • http://slp61.com/clients/e/e2/e296dcecfd7d10ffef0cc83fef253c72/File/2446458052.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_off0000ee3c.bin
72c85a0af3bbe5dea1715f6a0cb82c7a324ced21870187d6cfd0ae0f7e56d35b
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE3C 16604 bytes
font_01_sfnt_off00011968.bin
b3ad790729c5de8a2d766ace08d38c8f5c792c4b6862994149d22d71ec165c26
pdf-font-stream PDF embedded font (sfnt) at offset 0x11968 10012 bytes
font_02_sfnt_off00012fc8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12FC8 16792 bytes