Malicious PDF — malware analysis report

Static analysis result for SHA-256 46247405b1d6bca3…

MALICIOUS

PDF

87.7 KB Created: 2021-07-07 23:27:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: e94daf2a58937a4f43b922b8b408fa83 SHA-1: 2ed9cf1b14451ee9b869cebc0556b8fc17839a52 SHA-256: 46247405b1d6bca395fc81386f241834ae0030a7859812b4cca8990d8a1a1180
154 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. Heuristics indicate it functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites. These links likely serve as lures for phishing attacks or to distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7439

Heuristics 5

  • 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
  • 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://securityguardsupply.org/php/uploads/file/667684475.pdf In PDF document text
    • http://alexlunacoach.com/img/editor/file/43486892433.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/b143e548cf73959d42d222a74731c86d/tiribobodamupemisedugodo.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/16094173d268c1---96226327465.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/5uujr3kup09q3cspm5h5n1st2c/26395573800.pdfIn PDF document text
    • https://narimasu-chintai.net/jcfiles/file/69999455388.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608966dc62ffb---riwumiruzufivuvibosokiga.pdfIn PDF document text
    • http://oaklandscreche.ie/userfiles/files/61126224631.pdfIn PDF document text
    • https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/f5399cbd341d29b784cd36d367e848d3/gugazesogetasawirapowi.pdfIn PDF document text
    • http://constantemails.com/userfiles/file/1624488059binonusajosafowunikarex.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a7ece8d0e79---87281940952.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1606d22df0d5ef---potixak.pdfIn PDF document text
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/pt140k8l89mcnqip2bljvot8g6/nemaku.pdfIn PDF document text
    • http://spreewaldatelier.de/img/editor/file/kukotanizigasaxazo.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1607200497090f---manavasawe.pdfIn PDF document text
    • https://anukulagrotech.com/userfiles/file/lowosifobaramobebapozul.pdfIn PDF document text
    • http://www.ez4parcel.net/upfile/files/2021/07/02/4463112691.pdfIn PDF document text
    • http://prosquash.by/data/15634031212.pdfIn PDF document text
    • http://2478.ru/admin/ckfinder/userfiles/files/44798509511.pdfIn PDF document text
    • http://flywings.sk/UserFiles/file/58077068263.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/m197nqmiq6gdfc1rv928oegpl6/92970054001.pdfIn PDF document text
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/cbe99ee1ea6070ad260e09447f8a7c69/46565682050.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=meaning+of+amicablePDF 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_off0000f343.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF343 16964 bytes
SHA-256: a5b1f398e3f99db18af088daf6155ab96591b7a718e0dbe316acb1c6ae75a272
font_01_sfnt_off00011f46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F46 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013757.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13757 16164 bytes
SHA-256: fd494554c7a7a2c4488382a78096c535ff133766c7221992be4f6a58596b2467

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