Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd156d948dc0aa8c…

MALICIOUS

PDF

84.7 KB Created: 2021-09-03 01:54:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: f67cbe9aeed09e19c59329e1653f7713 SHA-1: 17b5e2f488a13302244b54060951bdba36e7a278 SHA-256: dd156d948dc0aa8c1fceb6013c3b4f106806c1f0a569965151088582325d835f
156 Risk Score

Malware Insights

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

The PDF contains a large number of external URIs pointing to various websites, many of which are hosted on compromised WordPress installations. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The file's structure as a link farm suggests an attempt to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • 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
  • 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://drafthe.ru/uplcv?utm_term=rcf+evox+8+v2+manual PDF link annotation
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160cf52806e7de---22178652925.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/5aunvj96uc7ebq9qnoskvpbte7/dogoloxufeb.pdfIn PDF document text
    • http://topcudental.com/img/userfiles/files/10773191873.pdfIn PDF document text
    • http://naasschoolofmotoring.ie/fckeditor/userfiles/file/16905628613.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608029a847975---xoroxexigi.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/f2c15c5d49f3a138d5f042a127a960d6/komarofulanagupoza.pdfIn PDF document text
    • https://oddluzanie.net/userfiles/file/rikiwemujomuteranusep.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/16078c5736b6a3---81750772592.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/2ae30ed903fa0fbdca0a6192fd6e3ecc/koker.pdfIn PDF document text
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081b2ccee291---1144847539.pdfIn PDF document text
    • https://triosms.com/userfiles/file/judagosojidavadakajitu.pdfIn PDF document text
    • https://lukili.ch/UserFiles/files/48697513802.pdfIn PDF document text
    • https://bunyaminerdemir.com/resimler/files/nipida.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/57003614946.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/dc29c9593743e1dfd83f6da68c353455/nafusivaxizapejozumolo.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c4d4b8c4e68---rizofafusug.pdfIn PDF document text
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/16096a038e0bba---11072325544.pdfIn PDF document text
    • https://x-leather.com/radsportfiles/file/zupogejotisodakodojojor.pdfIn PDF document text
    • http://thewhitmerlawfirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/totufejomeki.pdfIn PDF document text
    • http://gernano.eu/gfx/userfiles/files/47149060990.pdfIn PDF document text
    • https://wlao.on.ca/wp-content/plugins/super-forms/uploads/php/files/35aedd7eabc071d536654f99fd72fc04/josola.pdfIn PDF document text
    • https://armenia4d.com/contents//files/fufilibabazelebuxuxozadif.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b671d268078---zuvumelobarekekorik.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In 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_off0000e457.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE457 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fc6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC6E 10680 bytes
SHA-256: a0283b1b1be7b5ad3cbcf68cf6de189e10cbd41c67bd6849a96b6d5dd6bde886
font_02_sfnt_off00011500.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11500 18464 bytes
SHA-256: 1b0e43465136bc506cca5e11d8989eced1bdccda5303fe99906862ac57ab7b2b

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