Malicious PDF — malware analysis report

Static analysis result for SHA-256 86a42f6cb7ad44b6…

MALICIOUS

PDF

81.7 KB Created: 2021-09-07 22:55:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 610aba49fbb18b79a90d34d31c3badbb SHA-1: c042a343bfe31ccfd80b9af7dfc3472b5cba28f9 SHA-256: 86a42f6cb7ad44b680319204e5d49f72a2e8d534c7b38e3fbb2966a52841048d
164 Risk Score

Malware Insights

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

This PDF file contains embedded JavaScript and numerous external URLs, many of which point to compromised CMS uploads or disposable hosting. The heuristic firings indicate it functions as a link farm, likely designed to redirect users to malicious sites or phishing pages. The embedded JavaScript, while not fully analyzed due to obfuscation, is a common vector for initiating malicious actions within PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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
  • 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://ketchas.ru/uplcv?utm_term=endangered+species+in+the+philippines+pdf PDF link annotation
    • https://iominneapolis.com/wp-content/plugins/super-forms/uploads/php/files/bb53171c425322c89d57ea5a765d6190/95387803197.pdfIn PDF document text
    • https://davebakeragency.com/wp-content/plugins/super-forms/uploads/php/files/34e1cbb78009d24f7e966376bc47f006/93316102579.pdfIn PDF document text
    • https://goooinggroup.com/userfiles/files/20210721_094159.pdfIn PDF document text
    • https://amd-export.com/site/upload/file/dizanapawaduzesarenajigo.pdfIn PDF document text
    • http://tl-maskinfabrik.dk/userfiles/file/xatadinirenuwivaximi.pdfIn PDF document text
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091a76a7fab5---relarijutamilidizovirixi.pdfIn PDF document text
    • https://podereilmontaleo.it/writable/public/userfiles/file/joxamafakezobavimuk.pdfIn PDF document text
    • https://xn--49st2et51duvk.com/upload/files/piwejelibobakolujutosule.pdfIn PDF document text
    • http://www.aaar.cat/assets/js/ckfinder/userfiles/files/jojolasibuzas.pdfIn PDF document text
    • http://tinhdauvietnam.vn/upload/files/61433989684.pdfIn PDF document text
    • https://www.northernillumination.com/wp-content/plugins/super-forms/uploads/php/files/49702c58304a420d2669830bf8f17cc8/bivupujidado.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/161170c2b02cdc---baguziwurukobamug.pdfIn PDF document text
    • http://telekommarketing.com/firme_data/files/suzuzazitomumako.pdfIn PDF document text
    • https://binarbaidtrading.com/public_html/userfiles/file/gesudufixikudajusuv.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/lvja539eljpreq2t0p86p6cvu7/34207253226.pdfIn PDF document text
    • http://stsaischoolamritsar.com/slbdavbatala/userfiles/file/badopuwivegupugasavizewo.pdfIn PDF document text
    • http://k-souz.com/userfiles/file/xolekiwixefigexefijosob.pdfIn PDF document text
    • https://michelbarbot.com/upload/files/xetaxijipinev.pdfIn PDF document text
    • https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/0d00a9acd36ff2aad1b9d32d6157c300/80431997615.pdfIn PDF document text
    • https://viettincapital.vn/upload/files/sezupelolag.pdfIn PDF document text
    • https://weyergans-hcc.lv/userfiles/file/75708942337.pdfIn PDF document text
    • http://oppedisanorobertosrl.com/userfiles/files/6425212183.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16072b13697cfa---40150917310.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610eda1e6d8ce---71139928696.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA23 10760 bytes
SHA-256: 0013d7256e613a2e8eabdcfec3e66e2de8b531096f0fa820ee7959ae752e4ca2
font_01_sfnt_off0000f28e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF28E 18028 bytes
SHA-256: 4896491def775945c949f8087e5d40b605ec44bd6233743c6029fa26ea3ad808
font_02_sfnt_off00012114.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12114 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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