Malicious PDF — malware analysis report

Static analysis result for SHA-256 a90004a2443dc8a9…

MALICIOUS

PDF

81.2 KB Created: 2021-06-29 14:45:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 52239a2a4c92740f5421d0b13f000e6d SHA-1: 1c43a9d1bddd8b30bd9bd1f6f73f6f4afbef55a2 SHA-256: a90004a2443dc8a9afc07e5340d074e04c16774740f64ebcffdc8518988d7ec0
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains numerous links pointing to external resources, many of which are hosted on compromised WordPress sites or disposable domains, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to deliver a secondary payload or phishing content. No scripts were extracted, but the PDF structure itself is used to host and distribute links to potentially malicious files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 7

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://jfkanacon.org/data/userfiles/files/59117214347.pdf In PDF document text
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/vggahfg7306s73ee38ouenm30o/95479078932.pdfIn PDF document text
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a80cd3db1b---pewazoti.pdfIn PDF document text
    • http://zwickerfoto.hu/_user/file/kaboropaxisarupobid.pdfIn PDF document text
    • http://saopauloairporttransfers.com/ckfinder/userfiles/files/22007343190.pdfIn PDF document text
    • http://ambulatorioveterinarioscapindandrea.it/userfiles/files/rogupekotori.pdfIn PDF document text
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/b4541e930f1be1d8c83d6c839bbb5f23/sisipawugovuzisomofoda.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1609a62e66831c---9130982257.pdfIn PDF document text
    • https://adlinefor.com/home/webagen/public_html/korn/data/file/32804960371.pdfIn PDF document text
    • http://architects-desk.com/uploadsfile/39105260386.pdfIn PDF document text
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/572e737748f5144562eac7b09fb4cb88/repetunosetosarurorulol.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/o9fn4co4dblr4juvm1mqt4o825/fasikenonawimuvexiv.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/85ee3e8ab812f5d1bdf16e205e06bcb6/pelalixafuxajaxaliga.pdfIn PDF document text
    • https://www.zulilighting.com/wp-content/plugins/super-forms/uploads/php/files/23fb4b37416f462a64670871259f3c38/gurepuvovujodakoribaga.pdfIn PDF document text
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/zutawenut.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078d503c344e---46818078613.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160ad7672e7eed---buroxudukimufokufuzuxipul.pdfIn PDF document text
    • http://cdmvt.cz/sites/default/files/61826810500.pdfIn PDF document text
    • https://ksboutlet.com/file/files/guxivivotil.pdfIn PDF document text
    • http://tavernadelsnoguers.com/wp-content/plugins/super-forms/uploads/php/files/76d55be3f831b228ef02a1d2f3c6b573/disarotixajalajewiropeko.pdfIn PDF document text
    • http://villa-carlshorst.de/sites/default/files/file/rokidusadokorefesivexofun.pdfIn PDF document text
    • https://imotrading.com/images/userfiles/puvir.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/160720732d2255---bafis.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=kenny+chesney+way+down+herePDF 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_off0000dd37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD37 10424 bytes
SHA-256: b72b46e5bd7a6756f4a0e78461c172a12eb9fb2b09a48bc72b7edab59d7ea86a
font_01_sfnt_off0000f4d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4D5 16404 bytes
SHA-256: 932e0aef75ebb8313f2115286867b5aaeb10eec292289282a6213db24829e58e
font_02_sfnt_off00011f9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F9F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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