Malicious PDF — malware analysis report

Static analysis result for SHA-256 9198b5302a6735f9…

MALICIOUS

PDF

83.3 KB Created: 2021-09-02 03:11:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: e026fc748b60b0e412c6798b963a9dc6 SHA-1: 0734f2b19f3810f077afedb80bda2d33e0aa53b1 SHA-256: 9198b5302a6735f950a6764cf7154d69a08274ab692617b884d20c1a035eb691
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as containing a link farm pointing to compromised WordPress uploads and disposable hosting, indicating a potential phishing or malware distribution lure. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were extracted, the structure and URL findings point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://cityhigh78.com/clients/2/2d/2ddbae4fb74c169819b3574d76e4e264/File/jezikasodiletizigekoninap.pdf In PDF document text
    • https://postelezmasivu-ostrava.cz/ckfinder/userfiles/files/kadabazaxuraded.pdfIn PDF document text
    • https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/nli42rgoqhu9atr4hgrihgl64a/93662050102.pdfIn PDF document text
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/a9bbb33b34831ad507673e8576bdce3b/pabeduzubamemakudajufalib.pdfIn PDF document text
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/53051b4aed77dc73113c0ac0715c639a/mosuxemonejafatara.pdfIn PDF document text
    • https://srp-galabau-rostock.de/wp-content/plugins/super-forms/uploads/php/files/d6h162vuqhhcr628kqnc7q9vih/gemuzezudopabapi.pdfIn PDF document text
    • https://biogenetixpharma.com/ci/userfiles/files/32515601214.pdfIn PDF document text
    • http://zulaikhatextile.com/userfiles/files/sakuduxukuzutedobugop.pdfIn PDF document text
    • https://legend-chang.com/UserFiles/files/sikataniforalujik.pdfIn PDF document text
    • http://englandmatchshirts.com/assets/file/70096900810.pdfIn PDF document text
    • http://goang-hann.com/uploads/files/202108281419511704.pdfIn PDF document text
    • https://lwim-ouargla.dz/ar/files/titivigumuneg.pdfIn PDF document text
    • https://sacc-la-chaux-de-fonds.ch/fichiers/file/patejed.pdfIn PDF document text
    • http://kameleonhastanc.hu/files/file/lalosixa.pdfIn PDF document text
    • https://textosolutionslinguistiques.com/upload/editor/file/dosedexusowemominanufi.pdfIn PDF document text
    • http://bahtiyardishekimi.com/fckfiles/file/53498502123.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/n7a6v590mh4ijnqk3va12epm53/pamixa.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160881c7a88dc2---42875183199.pdfIn PDF document text
    • http://bike-aholic.com/UserFiles/file/50392092521.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073d4cda4c38---buwizewukodusitok.pdfIn PDF document text
    • http://wellfoto.cz/pictures/files/misozifozafo.pdfIn PDF document text
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/d04748e9a26c6a68fbd9916ba1bf4db3/6156126167.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f1e4185955---35929102513.pdfIn PDF document text
    • https://restavracia02.com/userfiles/file/12175539403.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=dr+dolittle+3+tamil+dubbed+movie+free+download+tamilrockersPDF 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_off0000d638.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD638 20776 bytes
SHA-256: 59c4a1f1241d649d51e7806aed59b1b9b8d36f548ca732616c878dbd98224a07
font_01_sfnt_off00010c8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C8D 11296 bytes
SHA-256: f8fd8a5021f89b3281fa583d1dfe8a0a15ad1e95e60c21d578115d478e2b9bc8
font_02_sfnt_off0001272c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1272C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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