Malicious PDF — malware analysis report

Static analysis result for SHA-256 75d854887bd010d1…

MALICIOUS

PDF

86.6 KB Created: 2021-07-02 08:03:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 28cd0555fa71dda258c0584a171805c0 SHA-1: ae0776aa8d7ebbb73cb52fcd668713a70b681bd9 SHA-256: 75d854887bd010d134fb690a8dbc7115c06c995fb54aa133ae6f61fb2948450a
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and ML classifiers, exhibiting characteristics of a link farm. It contains numerous links to external URLs hosted on compromised CMS platforms and disposable domains, suggesting an attempt to redirect users to malicious content. The presence of PDF_RANDOM_URL_LINK and PDF_SEO_DISPOSABLE_LINK_FARM heuristics indicates a deliberate effort to obscure the final destination and potentially evade detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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 https://nomylo.ru/uplcv?utm_term=if+you+have+gestational+diabetes PDF link annotation
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160890c939b27f---bofozom.pdfIn PDF document text
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/df59b120f8da744fa823e7e071437077/gogoxifitimepenurolazawex.pdfIn PDF document text
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/44uuhkenb1iq89mlnog0177shp/32569364794.pdfIn PDF document text
    • http://ekotop.eu/userfiles/file/33592870293.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/16076f37eb2d10---87975597608.pdfIn PDF document text
    • http://stallingreunion.com/clients/a/a3/a37dbb3dca22f8cb40f44de83fe48269/File/tidetazima.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/c7ff0fedc1c653fb79fded5d58c3040c/11746278953.pdfIn PDF document text
    • http://anthonyvienna.com/sites/default/files/file/tukidoxivobadidiw.pdfIn PDF document text
    • http://freetourscadiz.com//ckfinder/userfiles/files/zigapas.pdfIn PDF document text
    • http://zabradli-znerezu.cz/userfiles/file/23421564521.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608abdb7d791e---kufepalitilokeposu.pdfIn PDF document text
    • https://atl-50.com/files/file/moxamuwategoto.pdfIn PDF document text
    • https://contabil-fiscal.ro/mm/file/tolalanireresulizixowodiz.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/cumg9ec4s2sbdp2m9qa6ns5dd5/66075350762.pdfIn PDF document text
    • https://tlproduct.com/userfiles/file/28711741435.pdfIn PDF document text
    • http://ranaghatpchsschool.org/userfiles/file/nasezan.pdfIn PDF document text
    • https://www.electriclighting.com/wp-content/plugins/super-forms/uploads/php/files/e0299b7127bd4bba3b269d94a3c6788c/94477498951.pdfIn PDF document text
    • http://colafranceschi.it/userfiles/files/naferupudopewuvafonivoliv.pdfIn PDF document text
    • http://hevolta.com/upload/file/67020393983.pdfIn PDF document text
    • https://dimensioninteractive.com/WYSIWYGImage/file/6172716159.pdfIn PDF document text
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/badae9d5c136393c43e86ca8008a9adc/totevafupegexapadab.pdfIn PDF document text
    • https://dmvassociates.com/wp-content/plugins/super-forms/uploads/php/files/1fc77c0874ba2dc23e142c9a57a41296/jalogunepawunugakepejev.pdfIn PDF document text
    • https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/69d1d5d74909605a9575ca5ea8d17f88/xufupakugilevopuwet.pdfIn PDF document text
    • 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_off0000f028.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF028 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001083a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1083A 16356 bytes
SHA-256: 8f8c887546739052f77b86e3dc290bc13f36c34a87a111ec9243a8369378be8c
font_02_sfnt_off000132a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132A3 10904 bytes
SHA-256: 4ac5958d2396b8f8b49809ddc59018842b26a904cf7d169ddf2078dcc1b98827

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