Malicious PDF — malware analysis report

Static analysis result for SHA-256 f22e58a59fd61d3f…

MALICIOUS

PDF

80.9 KB Created: 2021-09-05 10:47:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 544804e95e8e4a857fafeca8f6b6068c SHA-1: 302ced978ae5fce1bd52e4a3e4271d921f58b71e SHA-256: f22e58a59fd61d3f10956f2abc5fa30e5a68176bf511fa9c3709b4908d20f87f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous links to external websites, many hosted on compromised WordPress sites or disposable domains, suggesting a phishing or malware distribution campaign. The presence of embedded URLs and the nature of the heuristics indicate an attempt to redirect 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://queure.ru/uplcv?utm_term=client+server+database+system+pdf PDF link annotation
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e49d000c9c---88074465645.pdfIn PDF document text
    • https://mgs-on-track.com/app/webroot/userfiles/file/66382296559.pdfIn PDF document text
    • http://timeyear-v.com/userfiles/file/34080408788.pdfIn PDF document text
    • https://termoformat.md/img/files/74455237517.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608607e088574---87505786798.pdfIn PDF document text
    • https://www.charroninc.com/wp-content/plugins/super-forms/uploads/php/files/f0fdfff6bb33c7bd297a400e478a4527/46320236426.pdfIn PDF document text
    • http://radissonhoteltraining.com/userfiles/file/4546974372.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca307d7717---83392719393.pdfIn PDF document text
    • http://simsvizag.com/contentimages/file/23793622174.pdfIn PDF document text
    • https://digireg.si/upload/gawufararinixidodujizin.pdfIn PDF document text
    • http://am-assets.com/aom/magnolia/userfiles/file/13488481887.pdfIn PDF document text
    • http://ttccid.com/userfiles/file/37492982377.pdfIn PDF document text
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608815778a13f---65862839717.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9754e66f4f---bizufubef.pdfIn PDF document text
    • https://artlabjo.com/userfiles/file/kepotilidugowodanir.pdfIn PDF document text
    • https://vitanov.rs/files/bagidajifipuk.pdfIn PDF document text
    • https://hotelexpert.ro/uploads/files/telidoxezukazadoj.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/0a265777953ddf7b7c7b68620a02df91/67968220006.pdfIn PDF document text
    • https://www.propertyfilevault.com/wp-content/plugins/super-forms/uploads/php/files/3e5c8ce612928f48bc3efae4750a0568/50141059286.pdfIn PDF document text
    • http://fluidearthconcrete.com/userfiles/file/95789763367.pdfIn PDF document text
    • http://www.physedu.in/newsite/userfiles/files/49246337207.pdfIn PDF document text
    • https://mziagroup.com/wp-content/plugins/super-forms/uploads/php/files/u0n5pdb5gnu4lkcpjhkfo3psvt/worot.pdfIn PDF document text
    • https://aartipalette.com/userfiles/file/batovufolekodubir.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_off0000d7a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7A6 10892 bytes
SHA-256: 9a119c8ca45391febed270548133e587d7e356dffa2f508e96de7775a4d1103c
font_01_sfnt_off0000f0a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0A5 17428 bytes
SHA-256: ff866716ac5c36b572012277fa82f655d0c4f68ebaf93a86dff7c4b930aa356b
font_02_sfnt_off00011d65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D65 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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