Malicious PDF — malware analysis report

Static analysis result for SHA-256 5067b164ce9e32f5…

MALICIOUS

PDF

88.0 KB Created: 2021-07-03 16:48:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: dc9a7bf3f06c830a62cf578c5e58c41b SHA-1: c279ff28065366d0b1df31188c359f571ba1a7d0 SHA-256: 5067b164ce9e32f50c271220a1409042b445302a02e1513e49441b4fb8b6a55e
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a link farm with numerous URLs pointing to compromised WordPress sites, suggesting it's used for phishing or distributing further malware. The presence of embedded URLs and the nature of the heuristics strongly suggest this document is part of a phishing campaign, likely delivered as an attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://cructi.ru/uplcv?utm_term=george+washington+crossing+the+delaware+is+depicted+on+what+states+commemorative+quarter PDF link annotation
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/a55a34773a4f31969d606030a93a52e6/zapenatudujugemajafozodos.pdfIn PDF document text
    • https://www.beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/4cd5770c431b4a15ebc14102b5a9ddf7/25667888016.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160872099b2226---judufiwibomap.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a6e4b73d7c---36096593810.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/nukgkrhj7smrtuvv3r6o61i5en/fejawopiwolukuf.pdfIn PDF document text
    • https://fo-prefectures.com/pages/files/wavapufifowaf.pdfIn PDF document text
    • https://sonntag-immobilien.lu/userfiles/files/26041974767.pdfIn PDF document text
    • http://a1-automotivegroup.com/upload/files/99619198489.pdfIn PDF document text
    • http://vladjurnalist.ru/archive/file/16681945681.pdfIn PDF document text
    • http://droprint.my/home/ququ4923/public_html/userfiles/file/37743587629.pdfIn PDF document text
    • https://www.reachcast.ca/wp-content/plugins/super-forms/uploads/php/files/f240e53371524d4df986a93591dd9bea/80220291824.pdfIn PDF document text
    • http://leaguengn.com/userfiles/file///28024878255.pdfIn PDF document text
    • http://srihemkuntschoolint.com/slbdavbatala/userfiles/file/60372609489.pdfIn PDF document text
    • https://www.asahinadigital.com/wp-content/plugins/super-forms/uploads/php/files/oephdhceg971b195jkamja03lu/sasabeletalitawirodekevuv.pdfIn PDF document text
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608ee964ca05b---kumizi.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083f25a719af---71496445819.pdfIn PDF document text
    • http://studiopol.com/userfiles/files/80792849515.pdfIn PDF document text
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/c652982a61348fe8f9534e154306b179/53074156285.pdfIn PDF document text
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160805810025fe---bubaxisavon.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1606f8e63355a2---40711190997.pdfIn PDF document text
    • http://apcmagon.com/userfiles/90170784521.pdfIn PDF document text
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607142f99358d---81439404263.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF16 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010728.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10728 18352 bytes
SHA-256: fd258e9a232708a7c9fdc9117c7c2ba707d4f5c7f80d15f22e572f1bfc7b7ee1
font_02_sfnt_off00013755.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13755 11400 bytes
SHA-256: 1bc1944b10cdc25f590dc9c8b4e020c98ebdc201e967b90c191f0720f0dc7bfe

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