Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ada33091ad007a7…

MALICIOUS

PDF

81.1 KB Created: 2021-09-04 23:33:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 3c483e30f9f138eb1530dab4e7a68aba SHA-1: fc6d730c09af8caf91e8cc71b9df5c8c70fdfa3c SHA-256: 9ada33091ad007a7996885874b2a061412d8022ad00fcc623eebbcb58937335e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting a link farm or phishing lure. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware distribution campaign, likely initiated via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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://reszke.pl/fckeditor/editor/filemanager/connectors/php/file/31229905792.pdf In PDF document text
    • http://xn--q20b13r9leepaeb.net/upload/file/202108260635510726.pdfIn PDF document text
    • https://ingatlansos.hu/images/userfiles/file/83812451614.pdfIn PDF document text
    • http://www.heksan.com.pl/file/fudujetolatu.pdfIn PDF document text
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/s84btf95tkopotpjnoddrmjod1/fovefovodixoxikadivuja.pdfIn PDF document text
    • https://raptiherbal.com/ckfinder/userfiles/files/79550072879.pdfIn PDF document text
    • http://meteosputnik.ru/userfiles/file/52675920657.pdfIn PDF document text
    • http://zkmeiqi.com/admin/ckfinder/upfile/files/66325228581.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1dc3e0bf8f---goleremijepuwumoguwa.pdfIn PDF document text
    • http://zbraneklapka.cz/ckfinder/userfiles/files/2492486212.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/8f9jnp7k3lphplf5dlocdv7d5p/lafap.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/c7914feae27dc0613b08062af7f510b8/bewosinojote.pdfIn PDF document text
    • http://etkindenetim.com/resimler/files/17211520251.pdfIn PDF document text
    • https://toolsatool.com/userfiles/files/lotiretage.pdfIn PDF document text
    • http://dnt-mayak.ru/content/File/wubatakewagukozabafula.pdfIn PDF document text
    • http://ecogestval.com/userfiles/file/pidosuzokivakikep.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608d59947d4cc---24701741073.pdfIn PDF document text
    • http://broadviewlibrary.org/uploaded_bvlib/file/81028141803.pdfIn PDF document text
    • http://ffarchitettura.it/userfiles/files/dovili.pdfIn PDF document text
    • http://surmounttravel.com/userfiles/files/jinaferubewitumenoveropiz.pdfIn PDF document text
    • http://pagyesa.org/userfiles/file/20210730041006.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1606f6db099e89---59906339630.pdfIn PDF document text
    • https://www.stjohnhomelessshelter.org/wp-content/plugins/super-forms/uploads/php/files/b7a6317a90fde2825cca73d41f0abe1b/xujiba.pdfIn PDF document text
    • https://citronixdeflection.com/nbloom/fckuploads/file/dibesupezadagibegomevut.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/54905487035.pdfIn PDF document text
    • http://eaupureinternational.com/userfiles/file/bewubalusawoj.pdfIn PDF document text
    • http://artpolinakuzina.ru/pict/file/litix.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=ecuaciones+matriciales+2o+bachillerato+pdfPDF 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_off0000d5b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5B9 18312 bytes
SHA-256: a221ff10715b09532f75dcca04885fcbdd1fa2aa6c755c2c70e0f5cfa569100c
font_01_sfnt_off00010440.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10440 11228 bytes
SHA-256: 42bf90a6724c07048310e64eb260f97ad38126fd34030da92c912511db968b99
font_02_sfnt_off00011e25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E25 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.