Malicious PDF — malware analysis report

Static analysis result for SHA-256 08aa8a501e3f8fba…

MALICIOUS

PDF

92.7 KB Created: 2021-07-01 17:42:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: de4eafdd1ecc70b6e158265b5c37bb49 SHA-1: 57c0c7687ac1183b9053a141def026868f5299df SHA-256: 08aa8a501e3f8fbaf89f9652a6679ad991e922860043216716a031e5fa053ab5
196 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with heuristics indicating it's a link farm pointing to compromised CMS upload storage. The document body, though heavily obfuscated, contains indicators consistent with advance-fee scams, suggesting a lure to download further malicious content. The presence of numerous URLs hosted on potentially compromised websites reinforces this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/f2kqrcn4lskgbrupfshe0337co/mokugufibure.pdf In PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d4d92c7cf11---4513009268.pdfIn PDF document text
    • http://komputerzagrosze.pl/userfiles/file/16773582421.pdfIn PDF document text
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c2c897aa86b---kinuwod.pdfIn PDF document text
    • http://andrelandberg.com/userfiles/file/71502827887.pdfIn PDF document text
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/04afbe5a8759601c1bc328a48ed5b5d4/31626213731.pdfIn PDF document text
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/lo78oqg2f02lhrqe2ko410nhak/sewitigodenokawu.pdfIn PDF document text
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/c9d6efjkoh4bavv50j6m6j8rdq/gatijegoxogegagabazaju.pdfIn PDF document text
    • http://cycling-software.com/files/file/kakizavafamedo.pdfIn PDF document text
    • http://whuntex.ru/userfiles/file/34893516224.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/1607cc788bba7c---zasizoj.pdfIn PDF document text
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/641ab4o8fm4ujff1mm8is446bi/gukonixo.pdfIn PDF document text
    • https://cutandcolorparrucchieri.it/file/rurewikav.pdfIn PDF document text
    • http://feach.ie/images/uploads/file/1651910117.pdfIn PDF document text
    • http://amexeuro.com/an3_Uploads/file/bigabi.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/515edc5ad19fc9d7f5da47fc14c97f8f/wogowodivanapi.pdfIn PDF document text
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/b893d535edf0b06575df13ea8e1b0a79/xurobepa.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/1607278cd9fc17---41159742967.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/536205b6b8d5e502d32e81a3696754f3/pafobupukizot.pdfIn PDF document text
    • https://denizlihorozu.com/resimler/files/77542416626.pdfIn PDF document text
    • http://coffee33.ru/archive/file/38877620860.pdfIn PDF document text
    • http://manavpublicschool.org/manav/userfiles/file/64987318700.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=project+selection+and+prioritizationPDF 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_off00010499.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10499 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011cab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CAB 19272 bytes
SHA-256: 09e8953e0985269a9f951a77e089bfd1d8a8c199e13a50dd6cb1972115c632d6
font_02_sfnt_off00014cdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14CDB 10696 bytes
SHA-256: 4853eeb91e668c837791ef154493258af068ccf25cd964ebe8939e5bd4e43a91

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