Malicious PDF — malware analysis report

Static analysis result for SHA-256 eadc7d49fa97f4af…

MALICIOUS

PDF

75.9 KB Created: 2021-06-26 00:05:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 71d3eaa68808cbf684fe492562ba81b5 SHA-1: d84c914e18c0057889d4df02b90ba9742cd11c04 SHA-256: eadc7d49fa97f4afe03539a36898e2471eaef3bb017bbc47f56e3f7ce8178dbb
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple websites, many of which are hosted on compromised CMS platforms or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The embedded URLs suggest an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/3afc979b5baabd3504f7b3c437ed7189/zodiwonufu.pdf
    • https://bmw-zona.ru/uploads/file/nofonuwasawebij.pdf
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/90b9a9b91f7518779549a98f632e87a5/90883662342.pdf
    • https://ovth.ch/userfiles/files/lifigefajose.pdf
    • https://anukulagrotech.com/userfiles/file/xozalipodadiguzonepebobi.pdf
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/rr7gu3vfc7o631l2l15dfd1ivn/67009124609.pdf
    • http://alexandercdg.com/clients/36029/File/xusesalifekarawafarobup.pdf
    • https://ludifrance.fr/userfiles/file/budesetoxopere.pdf
    • https://horgaszvelem.hu/ckfinder/userfiles/files/furatiwavegulikesev.pdf
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/f19945795891388c51ab908987039f2a/zeben.pdf
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/3274b955bf4ea6cda7d622a17a46e3e2/96322489153.pdf
    • https://mmszke.hu/files/file/wubomefopexikululaxefowib.pdf
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16099a90ea8d15---ruwedinirulilidesulow.pdf
    • http://wadirumshootingstars.com/userfiles/file///warobuxibofoz.pdf
    • http://memphiscentral1969.com/clients/865565/File/92707984645.pdf
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/oema3dkopfrjrofvu1af4jplu9/38529777561.pdf
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/36af27489a20a2bf2f07b2355e3e099b/33980923044.pdf
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609104ac1c7a3---gedofapubedejaxu.pdf
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d79ad0dfb6---bovojixugol.pdf
    • http://lncxjzxxw.com/upload_fck/file/2021-6-18/20210618093408102596.pdf
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d0c884659ce---fonulegeguwodozasepafadu.pdf
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/5e22d5fb3b99efdfd3d41b13e26008f8/mapifav.pdf
    • http://hzkontejnery.cz/ckfinder/userfiles/files/80722214998.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=elephant+and+piggie+elephants+cannot+dance
    • 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_off0000c6df.bin
20009664da3cbb58f75ed8c35d3a2d4175c2b76e534b56e0a96d73afd4f2b919
pdf-font-stream PDF embedded font (sfnt) at offset 0xC6DF 10676 bytes
font_01_sfnt_off0000df06.bin
e817edd03bedb46bfee07eb69e406443aa944934b9f12cc43ca5b70858eb90d3
pdf-font-stream PDF embedded font (sfnt) at offset 0xDF06 16524 bytes
font_02_sfnt_off00010a0f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10A0F 16792 bytes