Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d49641deb0beeb0…

MALICIOUS

PDF

86.4 KB Created: 2021-07-01 00:51:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 714da8f18520954d297237fe112c3c5c SHA-1: 7cd0eb690253c5b763ccc3a1becc7e1c8feeaad3 SHA-256: 3d49641deb0beeb05d7560c4554d70cf152ed3a48aeb1032638825c7431155df
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript, which is often used to initiate malicious actions. The heuristics indicate the document functions as a link farm, directing users to multiple external URLs hosted on compromised or disposable domains. The primary purpose appears to be redirecting users to potentially malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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.
  • 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 http://guides2alpes.fr/uploads/file/33764403708.pdf
    • https://www.helpforbusymums.com/wp-content/plugins/super-forms/uploads/php/files/49c3a94061d78a417eec4a31ae907091/49807073844.pdf
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/5e74a86f04cd090d3e494a15044e3156/pewutikegoguwumasiwevu.pdf
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf4b796d02b---xojozifi.pdf
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/bf4e27281882cd9ecc302df2c46f84f4/88083633018.pdf
    • http://citywideok.com/clients/75789/File/76760421751.pdf
    • http://stellarp.com/userfiles/files/manogelepinulira.pdf
    • https://alihuata.com/userfiles/file/31286357113.pdf
    • https://hartwellcook.com/wp-content/plugins/super-forms/uploads/php/files/f6c58c8f7606659e39c15cfb67c5a0fa/wigukanifab.pdf
    • https://eltonltd.ru/sites/default/files/uploads/wovuj.pdf
    • https://am-system.eu/ckfinder/userfiles/files/46335297835.pdf
    • http://grappin-annat-como.com/userfiles/grappin-annat-como.com/file/30179739615.pdf
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a70eef11b24---besutobezel.pdf
    • https://webupdate.ca/wp-content/plugins/super-forms/uploads/php/files/7g68qn13hf8qt55trucc9jj4qh/69701911036.pdf
    • http://adance0112.com/upfile/editor/file/zedenujojesokawovutabupe.pdf
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608702b53a6fe---55382491419.pdf
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/d6613221eabb57ff9956df0962196eb3/15827243251.pdf
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/8096919deaee8b8fea3ba2e20174e23c/65009522418.pdf
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/p9rcmarmea05j8edrpo1vpp9j9/47662736660.pdf
    • http://grandrosso.com/js/upload/files/zoropi.pdf
    • https://www.asahinadigital.com/wp-content/plugins/super-forms/uploads/php/files/h6hkd645b0tre121jofec1u403/45907144087.pdf
    • http://venusland.vn/app/webroot/img/files/5364547730.pdf
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077e9a376f79---mowavavafegobotonixaber.pdf
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/0690961561104b4e655a789aac43cbba/45007776126.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=what+happens+to+your+body+when+a+mosquito+bites+you
    • 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_off0000ec6e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC6E 16792 bytes
font_01_sfnt_off00010485.bin
4fa3d3bc1d7de5f09f98030e007344488b9d4bd3f9bb9a7ef382da0e6fed9e03
pdf-font-stream PDF embedded font (sfnt) at offset 0x10485 11192 bytes
font_02_sfnt_off00011e2b.bin
1f8a0b10e5aa37108f9cacb1f9e3f5f02e428270beb8bc00f532d34bd141cbb9
pdf-font-stream PDF embedded font (sfnt) at offset 0x11E2B 17500 bytes