Malicious PDF — malware analysis report

Static analysis result for SHA-256 9305db12382b5cc2…

MALICIOUS

PDF

98.8 KB Created: 2021-07-04 23:19:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 94d3f7338472dbda25d75a24f28fc6a6 SHA-1: 7186a5c2bdfe7dd09ec58018d8ccda134a08d774 SHA-256: 9305db12382b5cc2905ef120a8a93661e7d9b8c269a357b6c5c2c4219e340f8a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and a machine learning classifier. It contains a large number of external links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM heuristics indicates a focus on external redirection. While no scripts were explicitly extracted, the nature of the links suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://garglob.ru/uplcv?utm_term=right+to+education+act+2009+assignment
    • https://securityguardsupply.org/php/uploads/file/jojirukosovalufel.pdf
    • http://alimentosldm.com/userfiles/file/48074700240.pdf
    • https://papiratisk.cz/soubory/26268956627.pdf
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/16095e39ea9f07---xogezozipovew.pdf
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ccff309639---dasepipepatuwijav.pdf
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/du2ng7201grrde886dvbls735k/jifegujirakeligamer.pdf
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a7df353affb---mesujaj.pdf
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/b62e88323b4f0f42780c655d9039d59a/lapitisoge.pdf
    • https://alihuata.com/userfiles/file/97858647795.pdf
    • http://bezpieczna-strefa.pl/wp-content/plugins/super-forms/uploads/php/files/6f482f2a1ba3c11b3b7320ec6d2a1944/78333370813.pdf
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160976b477f464---33208806165.pdf
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077fd62d57d3---5682148450.pdf
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/d847d4df19898f20e1c0db64c9b2938c/doposamanovuwavosedipawo.pdf
    • http://josephlillianmorrisfamily.com/clients/59960/File/bovewowa.pdf
    • http://messtores.ca/fck_user_files/file/39495716263.pdf
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/faa9548909ebf230a1f38b0ca7582473/dobirevewedewe.pdf
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/ecd9f29a52a5df11f8a74605e9a1cb03/22408642719.pdf
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16070160c03422---54847496434.pdf
    • http://montri-inspection.com/naichabub.co.th/images/upload/userfiles/files/vesoganipotub.pdf
    • https://www.servicioscalibrados.com/wp-content/plugins/super-forms/uploads/php/files/68e136dd6e97a93d2763e243b39f1e3c/vafesoxoxavodoxudamunusir.pdf
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c03d2f86149---26603568374.pdf
    • https://kolbandibileklik.com/resimler/files/sidopojexasom.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011b35.bin
7a98666cb4981d6a3a45b33f25ce001babf36bb3ff8bdcffb77bdaae7e1103db
pdf-font-stream PDF embedded font (sfnt) at offset 0x11B35 11224 bytes
font_01_sfnt_off00013532.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13532 16792 bytes
font_02_sfnt_off00014d44.bin
8e9094c80547bfa2d783ee4be24f17df7ae94b1ec69c28358be3f8a78af9b650
pdf-font-stream PDF embedded font (sfnt) at offset 0x14D44 18808 bytes