Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a488ac43c274380…

MALICIOUS

PDF

86.5 KB Created: 2021-06-27 05:36:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: f7e893aaf1a6c44f0c3bc5279020145b SHA-1: 61dc5c9dc54354baf48bf1a1dd319c8e1fbfaf15 SHA-256: 2a488ac43c274380c7fed25bb871bb9e110ac906bdc226935d067afe04c0077b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, with numerous URLs pointing to compromised CMS upload storage and disposable hosting, suggesting it's used to distribute further malicious content or phish users. The presence of multiple external URIs and the overall structure point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://vallejardin.com/wp-content/plugins/super-forms/uploads/php/files/a08c29201c67618dd56e911cee6c44e7/pawivuvosapepotafumozem.pdf In PDF document text
    • http://lorofilmes.com/Uploads/ckfinder/userfiles/files/logivawumudak.pdfIn PDF document text
    • https://trellisdundee.com/wp-content/plugins/super-forms/uploads/php/files/c66cb138c57bbcbc87f19c999e957e66/98153872961.pdfIn PDF document text
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/g8bie4fi1d4rji9toknlr0v559/4745693391.pdfIn PDF document text
    • https://jbdclothiers.net/emailer/userfiles/file/gisanir.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160abbbb592bf9---fajuzefa.pdfIn PDF document text
    • http://ahchala.com/img/file/notuzavof.pdfIn PDF document text
    • https://loctra.net/userfiles/file/14258787556.pdfIn PDF document text
    • https://twfern.org/upload/ckfinder_temp/files/20210530172122.pdfIn PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/0muo70r59n95bvq9qehoqf30kl/sovusepu.pdfIn PDF document text
    • http://hi-reid-solutions.com/wp-content/plugins/super-forms/uploads/php/files/99cee06902b61560989253663263c7e9/21184890066.pdfIn PDF document text
    • https://beautyyaurient.com/editor_upload/file/72765889504.pdfIn PDF document text
    • https://banktapeunadana.com/tapeunadana/bank2/admin/userfiles/file/janadiwoxukudesoduso.pdfIn PDF document text
    • http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/2b9700148d9f501816e1c9f44f0474e4/gisamogeveposozog.pdfIn PDF document text
    • https://hifi-markt.eu/kunden/kronhardt/ckfinder/userfiles/files/zobepoz.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/a404b638d0bc06958667d4ed40ef5bc8/66044118615.pdfIn PDF document text
    • http://sam-global.info/files/file/56046925769.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16096960ad1a04---sewubatisixedapufaxaribo.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1d3d005817---55961607019.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084344db451e---90235800078.pdfIn PDF document text
    • http://tbm-mova.by/images_from_html_editor/file/4686422567.pdfIn PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/f127c136471cb019439320efdb5dee67/nikujinakutemo.pdfIn PDF document text
    • http://mgocsm.in/userfiles/file/lixix.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=mets+pitchers+2020PDF 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_off0000f101.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF101 17044 bytes
SHA-256: 21dc1ec660e82551dbb437a2529ee6f6f80ee435186ac38f508a374c8c0dffc9
font_01_sfnt_off00011d68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D68 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001357f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1357F 10272 bytes
SHA-256: 11cf22f4cd0077bc7eb4b64592a79152386f46dfd1265fe7f4884dba63c50bbd

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