Malicious PDF — malware analysis report

Static analysis result for SHA-256 94ace73ace7ac097…

MALICIOUS

PDF

96.8 KB Created: 2021-07-25 12:43:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2e0177b94b3283a9d56f9be46e3598ca SHA-1: 410de152fc5aa4226ad4fbbb7464ac1a69d74498 SHA-256: 94ace73ace7ac0975b3522256af73c436c1b6aa8bc6154f0c0be33ea3949aa04
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised CMS uploads and disposable domains, indicating a link farm designed to lure users to malicious sites. The ClamAV detection and ML classifier strongly suggest a phishing or malware distribution intent. No scripts were extracted, but the structure and URL patterns are indicative of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9888

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 http://kapsalonvogue.nl/files/file/dipuditoruvotenowomiwujib.pdf
    • http://orgue-chantepie.info/FCKeditor/upload/file/11558296980.pdf
    • http://architects-desk.com/uploadsfile/81799033799.pdf
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/08f0c12c6f83e292cd6f5a1c00a0e4e6/kemovilod.pdf
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/c62be37cb2dfdba2cbcc129a381b78b6/vudavifodabexawil.pdf
    • http://piau-po21inn.com/CKEdit/upload/files/15362895783.pdf
    • http://rentbucharest.net/images/userfiles/rufudivosewafezovopedexaz.pdf
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ddb86b4b078---61221961682.pdf
    • http://appletechsolutions.com/userfiles/file/pasam.pdf
    • http://ash-graphy.com/userfiles/file/31296416560.pdf
    • http://flyingcarpetclementines.com/userfiles/files/vudel.pdf
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a6061cef848---nadakose.pdf
    • https://afayl.com/userfiles/file/3822067814.pdf
    • https://chuyennhakienvangvn.net/upload/files/zaremexarapotakavaw.pdf
    • http://thedreaminitiative.org/Content/Admin/uploads/files/12657124551.pdf
    • https://its-bulgaria.bg/files/file/kuwewafonixur.pdf
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/160cb24bb03c60---19024597303.pdf
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/2b0f612d054fafd5f4449882a9ec4b1e/lefewegudeluvadenipe.pdf
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/57tukng0gcmp06msg35rfhg415/lolexonijagujujopefujid.pdf
    • https://bobecoingatlan.com/uploads/editor/file/denikaferabagelimarazuka.pdf
    • https://www.idd.no/ckfinder/userfiles/files/91498171718.pdf
    • https://szabobuszrendeles.hu/files/files/litur.pdf
    • http://smit-electronic.hr/upload/datoteke/fuvago.pdf
    • http://color-gateway.com/userfiles/file/ferufifasugojewewobomeba.pdf
    • http://laclonghotel.vn/upload/files/vasugefariwajesotavu.pdf
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/2aa3008b716d9bb48373da2eff048b56/lavemafixatokabufutovuw.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=where+to+put+bath+and+body+works+car+freshener
    • 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_off000114db.bin
34de7db1e7b9391cff68b5963f040f3ed87958b983ba8784d5498db686952cc6
pdf-font-stream PDF embedded font (sfnt) at offset 0x114DB 11104 bytes
font_01_sfnt_off00012e9a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12E9A 16792 bytes
font_02_sfnt_off000146ac.bin
b2458d991a9bab1077c5799ba7902cebf1f54b64cf6d668839957362dd3887ab
pdf-font-stream PDF embedded font (sfnt) at offset 0x146AC 17640 bytes