Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bbfb2a10684ef49…

MALICIOUS

PDF

93.0 KB Created: 2021-07-23 21:25:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 4123c4fd868a702791e1768757905769 SHA-1: 364f9c102a8856726f53a4ac018859458b93e423 SHA-256: 8bbfb2a10684ef49e6157a975e04f69e4e49a0e67d02fe3be55b2f7fc5017b09
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9480

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 http://wwm-quanta.com/upload/files/77827326726.pdf In PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b3268e85927---muveregadokizovofunerod.pdfIn PDF document text
    • https://dollarplus98.com/images/upload/files/74872006151.pdfIn PDF document text
    • https://hartwellcook.com/wp-content/plugins/super-forms/uploads/php/files/69351c72ff2e70eafdc2508d3114412f/jikikefulapisofi.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/0c5a58c577f53d18002e3c0d60b09042/lejexukitopigabiripazuf.pdfIn PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c0129fe53b0---41136453089.pdfIn PDF document text
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16089b73b22d6e---babinutobit.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/380550bf32e94e49e4deb90d8ebe61b6/76176373343.pdfIn PDF document text
    • http://parfumkin.ru/files/files/vovumukug.pdfIn PDF document text
    • http://dsm-trhs68.com/clients/8/81/818e764d3414495a915a5f66638dc9bf/File/xewojirifilupo.pdfIn PDF document text
    • https://baoholaodong24.com/userfiles/file/16672568343.pdfIn PDF document text
    • http://mousike.it/img_ins/files/82457853522.pdfIn PDF document text
    • http://mytmbc.org/fckimage/file/98730908694.pdfIn PDF document text
    • http://bluedevils59.com/clients/862365/File/97928436245.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/lipegokejisasanug.pdfIn PDF document text
    • http://apluskleaning.com/admin/images/file/rotijotanuvegeru.pdfIn PDF document text
    • https://nhaccugiare24h.com/uploads/userfiles/file/94705420013.pdfIn PDF document text
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/2c8v76ii3dbpqqh5e0fr62okbo/52191059406.pdfIn PDF document text
    • http://w-f-l.de/user_img/file/zuzawirivifojikorifegek.pdfIn PDF document text
    • https://cardion.dk/gfx/fckimages/file/devixafexavurisajijokef.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/l6s21tbq65l5uhr9a24rm8e0b5/45234212574.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ee3ccfb3333---5043877865.pdfIn PDF document text
    • http://pc75.net/upfiles/file/1621434260.pdfIn PDF document text
    • http://zatexpress.com//upload/userfiles/files/penamom.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf144a9fdb9---zemukavexoziw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=moto+x3m+2+unblocked+games+wtfPDF 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_off00011851.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11851 11432 bytes
SHA-256: 7f1de900a6c045df9fe91a2a6e8598c94e3a42469c272c77b4443d289f97abfe
font_01_sfnt_off00013358.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13358 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014b6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B6A 17288 bytes
SHA-256: 8dde8ad4f967ae07dd38ddccbc9c288297b9b80162526b7a9ff173cca6983c80