Malicious PDF — malware analysis report

Static analysis result for SHA-256 bae9d495dd014ce9…

MALICIOUS

PDF

85.8 KB Created: 2021-09-19 16:11:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: e6bc006b9565d745359f6e608d6eb6e9 SHA-1: cb61cd7a445c6ec3683e2d31ca14bc306b89789c SHA-256: bae9d495dd014ce928505ce3410655346a6db1af61fa6b64c9693732bec982b2
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://garglob.ru/uplcv?utm_term=reheat+meat+pie+in+air+fryer PDF link annotation
    • http://steffis-strassladen.de/userfiles/file/puzukav.pdfIn PDF document text
    • https://dailyiat.com/html_upload/file/kipopesilerorawuter.pdfIn PDF document text
    • http://deborahkay.com/ckfinder/userfiles/files/63902610782.pdfIn PDF document text
    • https://anyimaker.com/upload/users/files/volugavevatafigupipurus.pdfIn PDF document text
    • https://tungafilm.com/dorceiys/ckfinder/userfiles/files/gibaxesivofukoxogox.pdfIn PDF document text
    • http://www.egavilanes.com/ckfinder/userfiles/files/84291888281.pdfIn PDF document text
    • http://daithanhnam.com/upload/files/movepupisubepevojubeboben.pdfIn PDF document text
    • http://nhasachthunam.com/upload/files/xewusimilozalebusedijinew.pdfIn PDF document text
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/46028845d517c8864f5805dc9f6684b6/gavavuxejaxurez.pdfIn PDF document text
    • http://kes.org/upload/editor/files/vusiliwutaferivetosora.pdfIn PDF document text
    • http://dulichgiahy.com/upload/file/gasulixug.pdfIn PDF document text
    • http://kvarkeno56.ru/userfiles/file/dodatu.pdfIn PDF document text
    • https://ocw.tw/uploads/files/38572122202.pdfIn PDF document text
    • http://www.ville-dammarie.com/ckfinder/userfiles/files/1471251642.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/ce2a562d5ded1b9ff030f479df756a3b/xozibasogefarizileluzo.pdfIn PDF document text
    • http://relaxzenter.com/uploads/files/pataxagenemegipiregipiro.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/16146b822b77dc---96776346256.pdfIn PDF document text
    • https://millersexpress.com/userfiles/file/mozewivinajuliw.pdfIn PDF document text
    • http://bytip.net/filespath/files/20210919034457.pdfIn PDF document text
    • https://mashtalkandil.com/userfiles/file/koneruzuto.pdfIn PDF document text
    • https://aiwatopup.com/ckfinder/userfiles/files/70937013710.pdfIn PDF document text
    • http://homespakistan.net/magzine/uploadfiles/file/tajolove.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA19 10448 bytes
SHA-256: d483846ecdba5238340f0bbb4538c107da594793b90b48be2efa999f466caac8
font_01_sfnt_off00010199.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10199 18352 bytes
SHA-256: 93f66668680425fb867f3c603db90220b9b3075c23524ae9bdeb18221a6b4efa
font_02_sfnt_off0001317f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1317F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1