Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5db65e13ffeb8ea…

MALICIOUS

PDF

112.6 KB Created: 2021-07-23 03:27:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 9a383eef658026e46b69acd760b90f23 SHA-1: 1f0f515e0b289239061927fc9a4dc8e0323343f4 SHA-256: e5db65e13ffeb8ea3126777e3dce19c59fe0dba4a6dd7e9431c429bd35feda42
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external links, many of which point to compromised WordPress sites or disposable hosting, indicating a phishing or malware distribution attempt. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment. The embedded JavaScript likely facilitates the redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3781

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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://remoteworkerclub.com/wp-content/plugins/super-forms/uploads/php/files/18e6cc99867435f4f08480dadea1cfe2/79429467107.pdf In PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608f685b51934---nowafanixifuk.pdfIn PDF document text
    • http://www.euro-fly.eu/userfiles/files/pinijafokakaxopa.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4370625679---44238269460.pdfIn PDF document text
    • http://mdsalon.ru/img/lib/file/wirujaxojovupig.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072c0e900ce7---rarikukefadodewuzul.pdfIn PDF document text
    • http://arebiatours.com/uploads/files/15009630670.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/75f1fc3756b1ed550aa2b3ed49edb347/gipobumeruk.pdfIn PDF document text
    • http://kingcraftviet.com/uploads/ckfinder/files/80215780311.pdfIn PDF document text
    • http://prociweb.hu/sites/files/file/daruxoselaxibexufakigi.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/913db43d8779299d762fe7620ce4e4bb/xabelenebazegizomoriwi.pdfIn PDF document text
    • https://mcq-exambd.com/app/webroot/ckfinder/userfiles/files/96406237901.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160813cbde8af4---vevajavuve.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/537db9dd6b0585b352921f00190d3aaf/64077121737.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/beeff4b06e34faee2f791aef13c76681/gajisukejimana.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d46ba059dbb---xolazatizawifujewegez.pdfIn PDF document text
    • http://hurtglass.pl/upload/file/fulurunujasobufe.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/2b40095148153ec419d6082bc9e63efd/88393999300.pdfIn PDF document text
    • http://vivo-mebel.ru/upload/file/54936966948.pdfIn PDF document text
    • http://zs-g.jp/app/webroot/js/ckfinder/userfiles/files/959602730.pdfIn PDF document text
    • http://cityhelps.org/clients/6/61/61afa7a028a8e04f14432b0fece6f2b0/File/bapuju.pdfIn PDF document text
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/f4dd6ca781cdbd72f2baacbb04c378a2/totetat.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/a41eea43d6922f9c0c2718e85370f603/nomulikexiroradawebe.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082611709c02---84324289149.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=the+merchant+of+venice+quotes+shylockPDF link annotation
    • 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_off00015e47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E47 11080 bytes
SHA-256: 7d59a9a6e92351e2ab1dee72b0f04f59f6856c77ca34548784d5aa889e3652f9
font_01_sfnt_off00017800.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17800 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00019012.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19012 18352 bytes
SHA-256: 38c281f646d2eb02c72335d930b5f00278f1d54c3394dbb845c0849ee59044bb

Open this report in the interactive analyzer, or submit your own file for analysis.