Malicious PDF — malware analysis report

Static analysis result for SHA-256 29dcedf6d5dec59d…

MALICIOUS

PDF

87.7 KB Created: 2021-09-15 23:05:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: b9d33102cd2507b7a491be1fbc40998b SHA-1: 35e22bb5addcf1a087d2a14d41c9cc0a9f88cf22 SHA-256: 29dcedf6d5dec59dae7f88db11ee7810235c88a21c8c567078a53faa51592dac
176 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It functions as a link farm, directing users to various compromised websites and potentially malicious PDF files. The presence of multiple external URIs and link farm indicators suggests an attempt to lure users to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/01c7f19d8effc1141db24303a789e1e8/48034489166.pdf In PDF document text
    • http://falconartistmanagement.com/ckfinder/userfiles/files/sovuxejuvokimitur.pdfIn PDF document text
    • https://napraforgohotel.hu/upload/file/debunulotuv.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16140e450c149c---19522155523.pdfIn PDF document text
    • https://castilloexterior.net/ckfinder/userfiles/files/51568660699.pdfIn PDF document text
    • http://www.taylormadetc.com/siteadmin/ckfinder/userfiles/files/1850523630.pdfIn PDF document text
    • http://phutungvespaco.com/luutru/files/vorupodoxefavoxevejexi.pdfIn PDF document text
    • https://pre-www.bridge-academy.com/uploaded/ckeditor/files/guligidolijizivos.pdfIn PDF document text
    • https://cottingham-group.com/cufiles/files/jejexunanigowitale.pdfIn PDF document text
    • https://sardavetri.it/userfiles/file/budupezap.pdfIn PDF document text
    • https://www.iieng.org/editor/ckfinder/userfiles/files/94024041506.pdfIn PDF document text
    • http://dnepropress.net/files/file/27715074437.pdfIn PDF document text
    • https://terracetemayonetim.com/upload/ckfinder/files/ziwudusezoj.pdfIn PDF document text
    • http://thienthaopc.com/upload/FCK/file/12258307071.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137de9a70b16---40626460377.pdfIn PDF document text
    • http://aktasmatbaacilik.com/resimlerfiles/93049293510.pdfIn PDF document text
    • http://www.badischer-kunstverein.de/ckfinder/userfiles/files/20348804435.pdfIn PDF document text
    • https://espiber.cl/images/uploadedimages/file/fugeruvisuloxagitaleb.pdfIn PDF document text
    • http://le-nora.com/userfiles/file/14232126212.pdfIn PDF document text
    • https://sherwoodchamber.org/ckfinder/userfiles/files/kazipimenexu.pdfIn PDF document text
    • http://alptw.com/images/files/75161703185.pdfIn PDF document text
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bbe8a2f0ac---fumag.pdfIn PDF document text
    • https://propage.q-cloud.net/upload/ckeditor/pages/files/rasovetamew.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/xilalubapememenegejame.pdfIn PDF document text
    • https://apc-algercentre.dz/ckfinder/userfiles/files/nixenonezami.pdfIn PDF document text
    • https://tw-itemaos.com/ckfinder/userfiles/files/17678990558.pdfIn PDF document text
    • http://talentfuturesservices.com/sharpinstitute/images/files/58191618663.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=mobikora+tv+livePDF link annotation
    • 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_off0000f323.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF323 10120 bytes
SHA-256: a1bec3acceed68cac8136ff61bfd69058453f525cb55983afe6120bb1ff5418f
font_01_sfnt_off000109e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109E6 18460 bytes
SHA-256: 0c18f79109d33696aa2de65f649eb4531cb1d378a641c90983c137cfdb7e96de
font_02_sfnt_off000138be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138BE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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