Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e46f967e8f79a90…

MALICIOUS

PDF

85.2 KB Created: 2021-08-22 03:48:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: ae4997a94d3ce328fc0d7cc4c17745fc SHA-1: 954812b24bcbbefd7de248a5e579748dbc896e32 SHA-256: 4e46f967e8f79a90cef888ec2e597ef114b329a194325c1abdb0ca11115b9dd2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm pointing to multiple compromised WordPress sites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of numerous unknown URLs hosted on potentially compromised infrastructure supports the classification as a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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 http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073a7ac4d40a---vugiv.pdf In PDF document text
    • http://floridadressyourhome.com/uploaded_files/userfiles/files/jivaxabutux.pdfIn PDF document text
    • http://laser-piskovani.cz/democms/userfiles/file/xuleweguvidisab.pdfIn PDF document text
    • http://ghalemdi.com/userfiles/file/busitivomevagobofa.pdfIn PDF document text
    • http://dwallacelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/bekodutotebabezusiz.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e8507282cf---86961839627.pdfIn PDF document text
    • http://tainghe.vn/userfiles/file/koputak.pdfIn PDF document text
    • https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/0c438f9a4393292c5ba04064621fd944/jafivuzuk.pdfIn PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/kd4n2lln4ee2657ssfjl98n1r2/24025127717.pdfIn PDF document text
    • http://snap-drone.com/userfiles/file/81141043211.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/f4cc27a22fe80f7423f065743bf2e6f4/gavulebulilesererumuzupi.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16091ab2b45a8a---sanenulupe.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b45db087c9e---85693242631.pdfIn PDF document text
    • http://newtarrytowndeli.com/uploads/files/xulupukudogades.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607ba33073fed---duvabimefis.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/41d7c3764b761af03da32989cf268645/60564333760.pdfIn PDF document text
    • https://gplacestracker.com/userfiles/file/futewuvepezolexidososiv.pdfIn PDF document text
    • http://talleresjpg.es/img/file/fujaxawupezetirusugagox.pdfIn PDF document text
    • https://www.sixteengrams.com/wp-content/plugins/super-forms/uploads/php/files/0afe1c1dm6kn2c27v57lkf8mti/73644613068.pdfIn PDF document text
    • https://bednidhitraders.com/userfiles/file/bupemuzifojib.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160bd630a7b261---mepuger.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=simpson+3000+psi+pressure+washer+msv3024+manualPDF link annotation
    • https://www.rt9.rspo.org/ckfinder/userfiles/files/47409043310.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_off0000e710.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE710 11236 bytes
SHA-256: 4e1ebfa9dcaf29f366439b393c3f00ff5b6b8f12c72e502b15edb889687a09da
font_01_sfnt_off00010142.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10142 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011954.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11954 17332 bytes
SHA-256: b91ea92941f523a5a4f186769733f40f6d8357b5ed4fdfef965ce16adf81cf45