Malicious PDF — malware analysis report

Static analysis result for SHA-256 01f839c00a24655e…

MALICIOUS

PDF

88.6 KB Created: 2021-09-06 12:48:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: a93c0c3b583b491a4cfb1112ac6e647b SHA-1: aaba6f2c0eecfc0d2ebcf399458a669fb17e1918 SHA-256: 01f839c00a24655e907d0bf9e1b389c9b94f8f276dc28ef6c04cb3c22585857b
176 Risk Score

Malware Insights

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

This PDF document was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicate a high probability of maliciousness. The document employs a lure to encourage users to enable macros or editing, a common tactic for malware droppers. While no scripts were directly extracted, the presence of numerous links to potentially compromised CMS upload directories and disposable hosting suggests an attempt to host and distribute a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 7

  • 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.
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • 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://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/9a7c666cd8142f70bacb8560db0154b8/barenuwaluvupupumizes.pdf In PDF document text
    • https://aduanaldelvalle.com/userfiles/file/litefepaleduvipojafegorud.pdfIn PDF document text
    • http://wahluenfty.com/userfiles/38611313225.pdfIn PDF document text
    • http://remobudostol.pl/pliki/62478265712.pdfIn PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/a1f285fcce6dcddf4a5c7541beea85f1/favubelisol.pdfIn PDF document text
    • https://smobiil.eu/userfiles/files/96022545247.pdfIn PDF document text
    • https://www.le-domaine-de-hauterive.fr/ckfinder/userfiles/files/gudebazoriwikotuzijer.pdfIn PDF document text
    • http://jx4d.com/userfiles/file/98955765496.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1608b8895390d4---47754529725.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/a68e7f86129644399f6503ed7ead9636/43833513381.pdfIn PDF document text
    • https://cli-kh.com/uploads/files/202108231554544401.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a99b47dd36---gadosixirokerivobub.pdfIn PDF document text
    • http://georgekoldun.com/var/upload/file/sekewi.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/f28gcaijgg532vh7ggn24agldi/jejenuzakofowuxojo.pdfIn PDF document text
    • http://www.salpasafarit.fi/tiedostot/files/67257880275.pdfIn PDF document text
    • https://www.comperat-89.fr/ckfinder/userfiles/files/jedomajewuniva.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/61480aa53babd9e3110785c1bc8073ec/mogomutolonarotu.pdfIn PDF document text
    • https://clickbox.ro/images/file/zejed.pdfIn PDF document text
    • http://austral-immo.com/userfiles/files/76697274287.pdfIn PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/4d7a85cf7b62ea3f64fe228aab45706a/69122059744.pdfIn PDF document text
    • http://harringtonassociateslaw.com/Test/JabzMedicalBillingService/userfiles/file/womarejo.pdfIn PDF document text
    • https://arhstroi.by/uploads/files/wetexamarutirakofirobepub.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=pdf+splitter+download+free+full+versionPDF link annotation
    • https://www.rt9.rspo.org/ckfinder/userfiles/files/72159355246.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_off0000f28d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF28D 10744 bytes
SHA-256: cd26015daddf7773487e7036ece73e19bccf8b2b3465fbf92a34e20507bd50d6
font_01_sfnt_off00010b6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B6B 19060 bytes
SHA-256: 9ee40dbf4e7c235b3a53b3a554f7147925f746f18f9172c0d11768a2206c89d1
font_02_sfnt_off00013ce9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CE9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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