Malicious PDF — malware analysis report

Static analysis result for SHA-256 5aa38b8a5047d765…

MALICIOUS

PDF

86.3 KB Created: 2021-06-28 08:43:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 2fbd2784ff7903ff52c9fe00464c08db SHA-1: 7e78b80993245f63e945d705f30b76045d8184fd SHA-256: 5aa38b8a5047d765c39126729a21750f7fc660cc0ac83703bf12e76d2ea6e86b
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by multiple heuristics as malicious, including a ML classifier and ClamAV, and exhibits characteristics of an advance-fee scam. The document contains numerous links, many pointing to compromised CMS upload directories or disposable hosting, suggesting a distribution mechanism for malicious content. While no scripts were explicitly extracted, the PDF structure and link farm behavior indicate a phishing or scam attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://allycatering.com/userfiles/mejolapukag.pdf In PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/77485325361.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/a8e7b49b362c53478a77ee26dd2595b4/11959299534.pdfIn PDF document text
    • http://denki-shonan.com/uploadsfile/16890893166.pdfIn PDF document text
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/lodelejojiwi.pdfIn PDF document text
    • http://circuitvietnamcambodge.com/hinhanh/file/maxoxetevizika.pdfIn PDF document text
    • http://bright-mineral.com/uploadfile/file/2021061916320640.pdfIn PDF document text
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c324471cd2a---26042297530.pdfIn PDF document text
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab6b0771452---bifebowezutinagekem.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/61cb407115ec8f30a28fd69cc3a62c9f/kazuwudiwabinekulube.pdfIn PDF document text
    • https://www.oneirishrover.com/wp-content/plugins/super-forms/uploads/php/files/975d2689f044a6fcf1bae8468fce097a/44607407385.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/8cae0e768d60b7ae4d4111b8907905b6/80082658082.pdfIn PDF document text
    • http://munsusa.org/userfiles/file/20210524174252.pdfIn PDF document text
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/vo2vgfnrisg915ckj2vvso9e0c/76176925717.pdfIn PDF document text
    • https://sssmri.com/ckfinder/userfiles/files/vogepijozuzi.pdfIn PDF document text
    • http://dmhu.eu/uploads/uplib/file/88943902454.pdfIn PDF document text
    • http://kaitosushisb.com/uploads/files/18874937519.pdfIn PDF document text
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/3q9ahkjevdsq044qpngi55d11d/83614532021.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160cdc8c6a067f---24973780123.pdfIn PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/tfumufk5mrv55pk336ll3a340m/15709178268.pdfIn PDF document text
    • http://benardoutlite.com/admin/fckeditor/fckdata/file/18139350446.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=celebrity+bake+off+stand+up+to+cancer+2021PDF 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_off0000ec2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC2A 17260 bytes
SHA-256: e7786e8873aedaaa53435598f81b2a5f52307dbed392f3567c18475f6fdad2c6
font_01_sfnt_off0001191c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1191C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013133.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13133 11384 bytes
SHA-256: b6a5c02da0e4c8046ce922952331f1d34684692ed2e2d46de1005188a61296ff

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