Malicious PDF — malware analysis report

Static analysis result for SHA-256 032c1aba03d84b18…

MALICIOUS

PDF

87.9 KB Created: 2021-07-05 15:54:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 650c604c0867074667d9b4912d948c5c SHA-1: eaecb1269d63a816bec0fda7875ca4072068deb2 SHA-256: 032c1aba03d84b189cdbdde9156e87055f088130775e7f76f0d36e86a221237e
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The document body is heavily obfuscated and unreadable, providing no direct clues to its specific purpose beyond the heuristic findings.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/ovbprr4imdp6oa39cchj3dtqi7/nowujijapopesuduwili.pdf In PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/2716d86aa5ef26eb83c39dc6e4183629/vepafudoviravijoru.pdfIn PDF document text
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ac27aa9a189---gezosojemidixiv.pdfIn PDF document text
    • http://12shio5.com/contents//files/vojiwamis.pdfIn PDF document text
    • http://turar-mussin.com/userfiles/File/karijamalozuzepafobedena.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608daa0d9a5a4---wipitenejomolonopewaje.pdfIn PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/bg4a6ocjtg6gem402tq5isgesc/boxub.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/c350e767b9eb904978737d38771fefec/12012606568.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080fb7fb0502---turetatufiwazidilataxukid.pdfIn PDF document text
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1f6b5e6e06---liwivirezofiramemusabep.pdfIn PDF document text
    • http://cesurmakina.com/userfiles/file/lowajenone.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/cd8078a859453e3b0d8b43c724890e4b/nitogadekalalixebimawi.pdfIn PDF document text
    • http://anaminfo.com/attachfile/file/megasitiguzewu.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/lh7amna6p5046e7b37jbems1o5/zukujagavas.pdfIn PDF document text
    • http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/e04k7bmr6c4nt5q5gko4v24q22/milipekaluneme.pdfIn PDF document text
    • http://greece-ex.com/images/blog//file/ruvilen.pdfIn PDF document text
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072720b99eba---26181038144.pdfIn PDF document text
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/30e59edf06630a32fead9abf361a7936/37666539987.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cd9bbea1991---79792191417.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/1608550325aca9---11064092292.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160922a835c5bc---pomofatizixizulor.pdfIn PDF document text
    • http://alibabashipping.com/userfiles/file/41722587321.pdfIn PDF document text
    • http://dagmar-e.de/userfiles/file/83931229119.pdfIn PDF document text
    • https://rosycaffe.com/file/61016271484.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1607d30d770b12---vaxodokisanafafufoji.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=calisthenics+for+weight+lossPDF 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_off0000f745.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF745 10732 bytes
SHA-256: e4cfee9e70b2989ca7852bd4c7d8910bfa7116bbe2477b54608c42a07d2da24f
font_01_sfnt_off00010ffd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FFD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001280f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1280F 16404 bytes
SHA-256: 0709126ab849d1ea6f7c319ba2b4adc7deec429df2e3e013b8581ab9f5e977ce