Malicious PDF — malware analysis report

Static analysis result for SHA-256 979c400ea432cde3…

MALICIOUS

PDF

103.5 KB Created: 2021-07-10 02:38:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7b8ccfe665d3f78d72af3af00dae6609 SHA-1: b3f120c7a138a3a778ebb3bad2aa473d90d54c85 SHA-256: 979c400ea432cde3784e8fc042ae7df9cf1529c40bb290e3795650c0be761c21
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains embedded JavaScript and numerous links pointing to compromised WordPress sites, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to deliver a second-stage payload or lead users to a fraudulent site. The presence of embedded JS and external URIs points to T1059.007 (JavaScript) and T1566.001 (Spearphishing Attachment) as likely techniques.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9926

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 https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/3fb4e5f92d6097d594c874f4e38ff9c9/9834336624.pdf
    • https://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/0l8iee7prodvef91a1a7jkou41/45429731870.pdf
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fe0b4e1de5---15966074514.pdf
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/dfbcda830f63eb8a1ba0e0e32eb2a72e/63299533599.pdf
    • https://drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16073752ee131b---18441265861.pdf
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a9ba04ae310---fejezebusoluzuvunafixebaj.pdf
    • https://saint-florentin.charcutier-traiteur.fr/ckfinder/userfiles/files/rukorinevitikow.pdf
    • http://eyupsifalibitkiler.com/resimler/files/55377884961.pdf
    • https://teenvolunteerhouston.com/wp-content/plugins/super-forms/uploads/php/files/3bf78a232ff8705902188ceaf1c1d90f/dugudevaboxot.pdf
    • https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/e9be6bcb1d430f1f3b9a0fcd863b7393/xezasoxafoviji.pdf
    • http://williamshudson.org/clients/3/35/35bf74ce48b5c120232fd40fb4fe3e45/File/46320807031.pdf
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/8910c1f8509a5cc99f0411e7e22242b6/vaxikiliziwememozofeso.pdf
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/f5c691d63542b4ed8c95e1f4808f1e50/jejikifolegumidofom.pdf
    • https://noble-program.site/js/ckfinder/userfiles/files/benepajoxadig.pdf
    • https://alsterparkett.de/wp-content/plugins/super-forms/uploads/php/files/prbpu1bu053lss3ir0kss526us/jidavanomarisig.pdf
    • http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/da777448bffa52fa877ceff19ea44dd7/56120987677.pdf
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b3a0fd4d27---kusifufow.pdf
    • https://fablab808.com/nbloom/fckuploads/file/tujikonopanapuzagowekaze.pdf
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bb567bdb6ec---sepilolupimot.pdf
    • http://wisdomtours.net/upload/file/19427954899.pdf
    • http://www.contectrade.hu/fckfiles/file/vegimerepide.pdf
    • https://shared401k.com/wp-content/plugins/super-forms/uploads/php/files/35ebad9132fd1c81472ee8707b3f196f/lonamolonelefezam.pdf
    • http://samnakthodrahassob.com/userfiles/file/45944936279.pdf
    • http://n2nlah.org/UserFiles/file/71142983886.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=udl+multiple+means+of+representation+examples
    • 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_off0001324a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1324A 16792 bytes
font_01_sfnt_off00014a5c.bin
97e236875b64c5c2115f9ce84b2c672c6b365e142ce6326d08bb49407014f2db
pdf-font-stream PDF embedded font (sfnt) at offset 0x14A5C 17120 bytes
font_02_sfnt_off0001775f.bin
2745ac9f9bc5f4440d9b1af8e86fb565608aa09640af8c0bdd689ad30d4449d0
pdf-font-stream PDF embedded font (sfnt) at offset 0x1775F 10868 bytes