Malicious PDF — malware analysis report

Static analysis result for SHA-256 3de1c45a9a415031…

MALICIOUS

PDF

94.8 KB Created: 2021-07-08 01:53:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: d92abd5b7250fcf036b8fa496af34f4d SHA-1: 764963f41cb2f87e2bf6f31ed693d05c819aa409 SHA-256: 3de1c45a9a4150311ba9c8fe8b21160867602485ac7a0dbdb45a1f92e76ba9bd
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to lead users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9820

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://cabsfromheathrow.com/userfiles/file/jumezom.pdf In PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/160db098aecf3a---41553017429.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607af22622fac---nonevegajurivesavupu.pdfIn PDF document text
    • https://www.comperat-89.fr/ckfinder/userfiles/files/50838921747.pdfIn PDF document text
    • http://bruisedreedfoundation.org/clients/4/4d/4d9d7eec3bf3a09fa0457ace138f6a4e/File/42760566116.pdfIn PDF document text
    • https://aiwatopup.com/ckfinder/userfiles/files/tevarojare.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074173862224---95024978924.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/78ivhgdh07d4n2e2dlr8a18j3l/nijelowegetawitesom.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e3894ab7b7---29533209279.pdfIn PDF document text
    • http://veterina-hrib.cz/user-uploads/files/tiwepetu.pdfIn PDF document text
    • https://prtl.pl/userfiles/file/78733275890.pdfIn PDF document text
    • http://fruitvita.com/files/files/6411644645.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/6a4c9f9ac62521de42c8eb70ef8bbbbb/palazubofowebazunes.pdfIn PDF document text
    • http://w-f-l.de/user_img/file/lilide.pdfIn PDF document text
    • http://kartelabasligi.com/images_upload/files/gukodiwepibutobepiku.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608388004e2e6---40516573263.pdfIn PDF document text
    • https://thefencedocumentary.com/adminfiles/file/gudigadidapijedu.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/123569dfbcf6d54fc3e079fabd55fd68/58196889351.pdfIn PDF document text
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/ab4f03803c6c6c6ca34390b2cb0501f4/rujowomefudipejo.pdfIn PDF document text
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/n9i8rbf99tplp02j42bdigvmn0/85953301570.pdfIn PDF document text
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089d3b84af59---tebapuxopofudo.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/85f7f45e7c4c51e36f5a4237c8058cc3/79752301212.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c38cc30ab70---71940369423.pdfIn PDF document text
    • http://rc-mst.com/mst/_upload/files/bebukiro.pdfIn PDF document text
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/vqd6h36cavpb8fkah3ehsaj29i/38340762157.pdfIn PDF document text
    • https://dakotaterritorydevelopment.com/ckfinder/userfiles/files/jogenibatu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=can+you+get+your+license+back+after+being+revokedPDF 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_off00010dbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DBC 11192 bytes
SHA-256: 4f4019cd602d6588f9d02fe74db6c369969f6b1b9e2a5fd51cdc6d28341774c7
font_01_sfnt_off000127ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127EF 17364 bytes
SHA-256: c9d9c648a1454648009cb1adf11218aa20dd1e8c61f2f8f21d36078a65cf981f
font_02_sfnt_off00015554.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15554 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1