Malicious PDF — malware analysis report

Static analysis result for SHA-256 712c36ec9f5aedb6…

MALICIOUS

PDF

92.0 KB Created: 2021-07-04 01:24:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4d703489476a20a0b5e2ea8bc19b6488 SHA-1: 0393e9d67c208642a0b514a029f5ac79995cc72c SHA-256: 712c36ec9f5aedb6678500e9edd7de1593403bd439cc7305222c9d224b4d8e22
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple domains, many of which are hosted on compromised CMS upload storage, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with known malicious PDF lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/qqg95gep7kunmckh3sv0b415qj/buremifuvod.pdf
    • https://museuminiaturesbesalu.com/files/fugavemadep.pdf
    • https://cr2tek.com/userfiles/Proj_Name//files/pebixi.pdf
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/5db487e6965af1f358566ad672b625af/10287043810.pdf
    • http://jinanxintiandi.com/userfiles/files/97281169146.pdf
    • https://florerialafloresta.com/ckfinder/userfiles/files/vibojoxidowidebu.pdf
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/59767e20ffe2635684c62e2e1a5b947b/zagupitudarezowapupenutu.pdf
    • https://impactcleaningserviceskc.com/wp-content/plugins/super-forms/uploads/php/files/31d4d0d8afdedb614aa1915296ccf350/zatajedorowikatabexefode.pdf
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/a4d06e0ac61a8de64d0eeeb044ef6a34/49887842715.pdf
    • http://luatsubienhoa.com/upload/ck/files/levuvabugesanurimanox.pdf
    • https://bohemiamaestro.com/webpagebuilder/ckfinder/userfiles/files/gelelil.pdf
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/5553cd9b561f066bf2371208903805d3/5686084186.pdf
    • http://www.bash.cl/media/file/3811198117.pdf
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/84bac42737ac61513c6992f721c78fde/96645249457.pdf
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6dec37e798---60318371517.pdf
    • http://zabradli-znerezu.cz/userfiles/file/16992703643.pdf
    • http://happysmilecard.com/uploads/files/36178698127.pdf
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/35t36asu31ttfrtvlr6qui7pt3/vexoditabetuxowavijufomob.pdf
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/gp4ikk0vt54sfugp2sdada10au/kidoz.pdf
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/5a21395465bc3fc96ef660c49ec33551/32999996175.pdf
    • http://fzsvybbs.at/userfiles/file/tekaduni.pdf
    • https://ikima.fr/uploads/file/wunoleretazujetot.pdf
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/7331cqb724aae7sk8ojfo99s10/jabenuxesore.pdf
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/76c45b5df07fdfe8784d76d971b6fcce/45250608922.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=abby+brittany+hensel
    • 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_off00010685.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10685 16792 bytes
font_01_sfnt_off00011e9c.bin
bb0f4c1a0f891b9c1acedc00ace0cee0c0d952f381ae01e25cdf92b7cb547cc9
pdf-font-stream PDF embedded font (sfnt) at offset 0x11E9C 10320 bytes
font_02_sfnt_off000135da.bin
b746688feaf48de1934c202354626b47d61cca6029a0b4208d941407304400d7
pdf-font-stream PDF embedded font (sfnt) at offset 0x135DA 17208 bytes