Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e7a29396ee3ee31…

MALICIOUS

PDF

76.1 KB Created: 2021-09-02 05:13:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 4549fa9cb4d4ee39eddc8e5c878294c6 SHA-1: f3110144a7fc3a0e9d3d65d0a7445e8997872611 SHA-256: 7e7a29396ee3ee3121f35d596c0a8070bf8ca15d80662971fc6c3b768b5512fc
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. Numerous embedded links were found, with several pointing to compromised CMS upload storage, suggesting a phishing or malware distribution attempt. The document body was unreadable, but the heuristics strongly indicate a link farm designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/hotndn8ot1q52hh571l79s7pga/65094053246.pdf In PDF document text
    • https://panificioilcavaliere.it/userfiles/files/laxezozotema.pdfIn PDF document text
    • http://criollo-cocoa.com/userfiles/file/95044580983.pdfIn PDF document text
    • https://cdpu.net/wp-content/plugins/super-forms/uploads/php/files/c9dc560a6989907469725653009b5d11/ruxironiked.pdfIn PDF document text
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160765ba5be4fc---14555937892.pdfIn PDF document text
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/mpjan6g0478rtl6bl2mqhgi79j/90673799412.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609541fde143e---vemajubefejapuduxoturu.pdfIn PDF document text
    • https://etimes.mn/uploads/files/gejemagogu.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf3d7249ed6---92007632153.pdfIn PDF document text
    • https://birudongker.com/contents//files/26966195893.pdfIn PDF document text
    • http://toyotacri.com/userfiles/files/364283029.pdfIn PDF document text
    • http://apsara.ru/userfiles/file/nodedamonevewazijaluxab.pdfIn PDF document text
    • http://samsung-service-center.ru/uploads/files/sugefudoligajajuzaxaxu.pdfIn PDF document text
    • http://koreaseowon.com/ckupload/files/27713002814.pdfIn PDF document text
    • http://dogalakustik.com/depo/sayfaresim/file/vageraruvewufoji.pdfIn PDF document text
    • http://ehomeforeclosure.org/images/file/3026424907.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16091dabbd9192---96796949130.pdfIn PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abdc5f873a8---35302334524.pdfIn PDF document text
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/79ef24ea217d0ce7f110c482e86f07d8/pajotupiruwexovixubo.pdfIn PDF document text
    • https://conexus-study-abroad-travel.com/ckfinder/userfiles/file/fawuloxorim.pdfIn PDF document text
    • http://adance0112.com/upfile/editor/file/wivikiwipivabeduf.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c695944626d---3381977502.pdfIn PDF document text
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d031f793b3---wudot.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=saw+the+final+chapter+watch+onlinePDF 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_off0000c798.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC798 10572 bytes
SHA-256: 8bb10f5871fe8b8161175f1a8a16c0686b64dae00902c29f2b4f5f2f5b742613
font_01_sfnt_off0000dfb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFB4 16788 bytes
SHA-256: f6db96c56aefbf6aa515e411a5255fc068672d49994976936d7bd7c49af05c06
font_02_sfnt_off00010b31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B31 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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