Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0de052db08ed3ff…

MALICIOUS

PDF

88.9 KB Created: 2021-07-05 14:28:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 972f9767d5a7eb5c530e9aeb62ed9c6e SHA-1: 280fc9d107479bcf8f4a0ff55b6eaba311bb0ad1 SHA-256: c0de052db08ed3ff5e525429e20e9ff9f71ceed61cb49eeb50abce69dedd68ce
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a link farm pointing to compromised WordPress uploads and disposable hosting, suggesting an attempt to distribute malicious content or redirect users to phishing sites. The heuristic 'SE_INVOICE_LURE' indicates the document's content is designed to deceive users into taking action, likely by clicking on the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 7

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://iamtimeshare.com/userfiles/file/90238485134.pdf
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/a16cc2b7c3318dec086d75ce60fb9db9/tesevovugexefimune.pdf
    • http://homespakistan.net/magzine/uploadfiles/file/mizurefatelorajotuvo.pdf
    • http://feynburg-uhren.de/uploads/92080601578.pdf
    • https://karinbentum.nl/uploads/file/pubefodabotoluvirupogizar.pdf
    • http://fapannimario.it/userfiles/files/27432814555.pdf
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/bpqs2diuavv51oralnorc90lcb/titenutudowunu.pdf
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1609670c561bec---89743318195.pdf
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/fb3ea3710074ced81c57879e3808c3fe/nezeveziwavur.pdf
    • https://vmwarts.com/ecovic/file/13330901928.pdf
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b27bbbdc49---62471391318.pdf
    • http://droprint.my/home/ququ4923/public_html/userfiles/file/37743587629.pdf
    • http://ankaser.com/userfiles/file/37440635759.pdf
    • https://wulf-sanitaer.de/wp-content/plugins/super-forms/uploads/php/files/n1n7k956nlvh5a1qedo6t81ndi/67987480582.pdf
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/849e8cd0e29a67102af6ea154e8b7848/mivememidiposit.pdf
    • http://highendschmiede.de/highendfiles/file/12988295615.pdf
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084b8e39e307---1926861084.pdf
    • http://nacyc.jp/Upload/file/sirunaxujaraxiluvo.pdf
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/89206ff12e42ec250c09f2f9018bcf89/21868445177.pdf
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/16084f07d41fb8---xokawajenedifozepame.pdf
    • https://goodluckfishing.com/ckfinder/userfiles/files/kotopokakada.pdf
    • https://gregor-biffiger.ch/userfiles/file/nejoraku.pdf
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a5fb8b52333---vedobitaxudinakebapugo.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=mortgage+calculator+with+amortization+schedule+by+year
    • 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_off0000f3a1.bin
b1b7ffc2b6635e8e3233c9a2779dde0a6856f37ec80a10cdd820cb8910740cc9
pdf-font-stream PDF embedded font (sfnt) at offset 0xF3A1 11312 bytes
font_01_sfnt_off00010df5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10DF5 16792 bytes
font_02_sfnt_off00012607.bin
8a24f606b114e2ea3079c6911d25b28a3b4776914eeba73a006607f2d8690f67
pdf-font-stream PDF embedded font (sfnt) at offset 0x12607 17512 bytes