Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a0db26944422e8d…

MALICIOUS

PDF

83.5 KB Created: 2021-08-06 18:06:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 758c794113815a08c35fe109961ce95e SHA-1: 2173a2cbd43ab5773b69399d17307f11e021f47c SHA-256: 6a0db26944422e8d80e1de3b4ace09e21792171801a84d3de81083b326022b80
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised WordPress sites, a common technique for distributing phishing or malware. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of external URIs and link farms suggests an attempt to redirect users to malicious content, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/160befbb066028---kepujabufojupole.pdf In PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/552b62a0bbb0ab674be3d64a764b5bb9/47792411511.pdfIn PDF document text
    • https://biogenetixpharma.com/ci/userfiles/files/piwufikeduvesu.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606efb7a7fbc5---38183436085.pdfIn PDF document text
    • http://badischer-kunstverein.de/ckfinder/userfiles/files/nekogojazilimuwizezigogu.pdfIn PDF document text
    • http://alnadaoil.com/userfiles/file/nalapemoboranolefaramanov.pdfIn PDF document text
    • https://vialivonica.eu/userfiles/files/pabowukalabusosejiza.pdfIn PDF document text
    • https://lightspec.ca/wp-content/plugins/super-forms/uploads/php/files/d04ed8091f124fd168d2164b3fb41f6e/49272602838.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f6c16ee568---furuwawamejerowagijun.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609e002bb421c---41293251359.pdfIn PDF document text
    • https://sckprime.com/wp-content/plugins/super-forms/uploads/php/files/02e4f532b24cbf540999a0d6f1ed941f/nazetoramunotoz.pdfIn PDF document text
    • http://lifemartrealestateconnect.com/wp-content/plugins/super-forms/uploads/php/files/b659n8ipq2n8jufse6ab91sco3/zibuduburalowezixuxekaj.pdfIn PDF document text
    • https://inncredel.com/uploads/tuluxud.pdfIn PDF document text
    • https://curewelldiabetes.com/userfiles/file/75922196268.pdfIn PDF document text
    • http://altelaw.com/uploads/image/file/kagurevotosarodolalusa.pdfIn PDF document text
    • https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/smdi1qkq2ahanuujuisec2e2c1/75390573369.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d27eb1ec357---lusefakak.pdfIn PDF document text
    • http://www.verneteco.com/ckfinder/userfiles/files/77374044972.pdfIn PDF document text
    • http://alkanboya.com/files/file///vibewatusukanexil.pdfIn PDF document text
    • http://bakoca.hu/files/file/42116850898.pdfIn PDF document text
    • https://gulf-rope.com/images/bulk_images/files/24573971830.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16081bb8e80f44---suzevajotevotusi.pdfIn PDF document text
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/92vc0t51lcvhrln86o1ftf4u1d/17949272003.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=homojen+kar%C4%B1%C5%9F%C4%B1mlara+%C3%B6rnekler+hangileridirPDF 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_off0000def4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEF4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f70b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF70B 11144 bytes
SHA-256: fe917af266f789a610d9c3d7e65186b636b60508dfa246d4734cb6b1162173ff
font_02_sfnt_off00011016.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11016 18716 bytes
SHA-256: e32a98fcfcf76adb0ba3fa40b2d3402e654f19511a610d0bb4904c65c1e64f66

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