Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3fa9657e92e8581…

MALICIOUS

PDF

81.7 KB Created: 2022-06-15 04:43:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2022-07-15
MD5: 30738a932c52721134eac323c1c1f920 SHA-1: 8a58f8624cda90d9b06403b1ae6f447005ee4600 SHA-256: c3fa9657e92e8581bb090031d87a2dc22e2dfdc5f56996ad0946ff4bbfa6483b
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains embedded JavaScript and a significant number of external links, indicating a malicious intent to redirect users. The ClamAV detection and ML classifier strongly suggest this is a phishing or trojan delivery mechanism. The embedded JavaScript likely facilitates the redirection or further payload execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9934

Heuristics 6

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://mifuj.co.za/YmrXLWy8?keyword=addie%20model%20instructional%20design%20pdf%20file%20pdf%20online
    • https://www.naturecare.com.au/kcfinder/upload/files/laloku.pdf
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/gik9ki0i6koeoov0fr9l684hi3/13385209723.pdf
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/fc96b56d7d2c0a3f5dc092b8aa3484ca/tofijab.pdf
    • https://tijisikazodiz.weebly.com/uploads/1/3/4/6/134666015/novafumuw-feropi.pdf
    • http://quimis.org/js/ckfinder/userfiles/files/43987900701.pdf
    • https://vetesigajis.weebly.com/uploads/1/4/1/7/141746508/sexibag.pdf
    • https://rufufuwoka.weebly.com/uploads/1/3/1/4/131454634/xumitizinelezapidop.pdf
    • https://mebugiroxubo.weebly.com/uploads/1/3/0/7/130776511/lapodunivifexep_ravegase.pdf
    • https://bimukata.weebly.com/uploads/1/3/4/5/134598529/589713.pdf
    • https://sojebubibofanex.weebly.com/uploads/1/3/4/5/134512436/5359389.pdf
    • https://bokavijuporuxeb.weebly.com/uploads/1/3/3/9/133997451/c43cd093.pdf
    • https://bonomomu.weebly.com/uploads/1/3/0/7/130775928/0fd2a18a66.pdf
    • https://www.cltservices.net/backoffice/kcfinder/upload/files/18897456418.pdf
    • http://raovat.coi.vn/uploads/userfiles/file/28880453705.pdf
    • http://www.etiquettes-adhesives-bobine.fr/kcfinder/upload/files/kewojepasijegukomigavusal.pdf
    • http://sieuthicayxanh.vn/webroot/img/files/vivuruvufu.pdf
    • http://nattuvaartha.com/assets/ckfinder/core/connector/php/uploads/files/2442743757.pdf
    • https://sedajavogip.weebly.com/uploads/1/3/7/5/137504845/1c3c9555f2.pdf
    • https://hotnews.md/upload/userfiles/files/tawuropobutasavupexog.pdf
    • http://robinph.com/images/file/powevifaramobumuderuxoxas.pdf
    • https://bewobuvepo.weebly.com/uploads/1/3/2/6/132695749/rimov.pdf
    • https://ph2020.org/ckfinder/userfiles/files/79958679384.pdf
    • https://baneboveboxov.weebly.com/uploads/1/3/0/7/130775782/3623593.pdf
    • https://kogakaxowewa.weebly.com/uploads/1/4/1/9/141903445/0fbcfabafce.pdf
    • http://grancanariacomercio.com/documentos/file/4718422867.pdf
    • https://kiwinokiv.weebly.com/uploads/1/4/1/5/141532156/23118d70a053b55.pdf
    • https://vejamepune.weebly.com/uploads/1/3/0/7/130776484/5887.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_off0000d31c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD31C 16792 bytes
font_01_sfnt_off0000eb33.bin
d4154bd5cd5accc15e03d58c77924f3c43ea488805b833bd2e28a39dcb512797
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB33 11044 bytes
font_02_sfnt_off000104af.bin
cb36a01896ad18c0f7d14855e4a21ee8c5e14c729c1938edd734a82d6fb95dd1
pdf-font-stream PDF embedded font (sfnt) at offset 0x104AF 19572 bytes