Malicious PDF — malware analysis report

Static analysis result for SHA-256 881150d6841b38c1…

MALICIOUS

PDF

81.8 KB Created: 2021-09-11 01:28:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: f637db825fb0798ed3d5aefcf62fa208 SHA-1: 1134e61f57e773e6ec005124685c9fda9e6271c1 SHA-256: 881150d6841b38c129ae67b66458c7e5ba39531b70bcad5349f70ad7f7c71a86
182 Risk Score

Malware Insights

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

The PDF contains JavaScript actions and numerous embedded URLs pointing to potentially malicious PDF files hosted on various domains. The heuristic 'ML_NYX_PDF_MALICIOUS' and ClamAV detection confirm its malicious nature. The presence of JavaScript suggests an attempt to execute code, likely to facilitate the download or redirection to further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6386

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • JavaScript action low PDF_JAVASCRIPT
    PDF contains a /JavaScript action. 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
  • 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://pixomot.ru/uplcv?utm_term=vlc+android+chromecast+not+working PDF link annotation
    • https://ruta.hu/ckfinder/userfiles/files/91257954290.pdfIn PDF document text
    • http://webcertain.ca/contentupload/fckeditorUploads/organization_/file/dodejofemiwajejiba.pdfIn PDF document text
    • http://aquarium-kochi.com/app/webroot/ckfinder/userfiles/files/wikabop.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/9bf96a7750cac5a620d040de189cfb4e/35219687174.pdfIn PDF document text
    • http://ty6600.com/userfiles/file/93444192140.pdfIn PDF document text
    • http://fundacjaproartis.pl/javascript/ckfinder/userfiles/files/xisugilekavorerevowaju.pdfIn PDF document text
    • http://duef.ru/public/file/wulumezelekide.pdfIn PDF document text
    • https://tpijobportal.com/ckeditor/ckfinder/userfiles/files/99137784124.pdfIn PDF document text
    • http://geodavidepini.it/userfiles/files/bazuxe.pdfIn PDF document text
    • http://rhondachem.com/d/files/34284148115.pdfIn PDF document text
    • http://www.tahi.hu/ckfinder/userfiles/files/mewiv.pdfIn PDF document text
    • https://shevian.com/images/file/32914071154.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bcb0939921---dopegizasixove.pdfIn PDF document text
    • http://sparkpro.lv/content/file/29099896824.pdfIn PDF document text
    • http://youngshiny.com/userfiles/file/1631312842.pdfIn PDF document text
    • https://nilsahost.com/calisma2/files/uploads/31709615141.pdfIn PDF document text
    • https://vanrun-it.nl/userfiles/files/17437009556.pdfIn PDF document text
    • http://vizugy.hu/uploads/files/17552947760.pdfIn PDF document text
    • http://unixsensor.com/uploads/files/202109080235477447.pdfIn PDF document text
    • http://whatdwellswithin.com/file/85995422395.pdfIn PDF document text
    • http://c-six.it/userfiles/files/bumab.pdfIn PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/uo3rh1vetstojtdcj3t66ehfkg/lenorupewe.pdfIn PDF document text
    • https://arbormaster.net/uploads/files/fixegefalimodozugajixin.pdfIn PDF document text
    • http://jcpingie.be/public/files/gexukutugigo.pdfIn PDF document text
    • http://www.astmalek.cz/obrazky/file/87535672777.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/fadf16574dd38336d1a9c4d93025b4af/52307662441.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135ec38d6197---2255389395.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4F8 16980 bytes
SHA-256: 3521710296dec02133e46dbebca19d0d7487b5aa5573537f9655c5cb96078abc
font_01_sfnt_off000110d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110D8 10964 bytes
SHA-256: b75b44cd9329b374598c7d83d163ac6bd37220ce9559551b77c93e0697ba2071
font_02_sfnt_off000129ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129FF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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