Malicious PDF — malware analysis report

Static analysis result for SHA-256 282076a7a7b0f84e…

MALICIOUS

PDF

93.9 KB Created: 2021-07-06 04:06:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: eff86407b40b06cdc33e451d40444474 SHA-1: 8f194adb29c40d358b347e3c997234c16cef14e1 SHA-256: 282076a7a7b0f84e365b943e4b48647781c82d85821880694d6c77da08bb5388
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on compromised WordPress sites or disposable domains, suggesting a link farm designed to lead users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are consistent with a document used to redirect victims.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9786

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://allytemp.ru/uplcv?utm_term=coleslaw+dressing+without+sugar PDF link annotation
    • http://dulichtantai.com/files/uploaded/files/boxiwexabonirowupuv.pdfIn PDF document text
    • http://kcobafl.org/ckfinder/userfiles/files/gomusi.pdfIn PDF document text
    • http://metallpress.info/files/nadekofulorelus.pdfIn PDF document text
    • http://aftckwt.com/uploads/file/sejuxexaxasanefitekapa.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/691947a38867ab5613bb54aa808ab14a/62016369303.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/dihlj10v859p8e2cuk94l28457/vepipisaguwogon.pdfIn PDF document text
    • https://santchavarabed.in/ckfinder/userfiles/files/85113010441.pdfIn PDF document text
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/98c339468a7371f7b7e6bd5793f442fe/61741186763.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160cb77f7f2429---dorapovirojusoxix.pdfIn PDF document text
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/321c52505760c4f5112153e49a2967bb/20476114830.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/16090fb5d6b51e---30113365417.pdfIn PDF document text
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/6qjvbhf0lnerntorheju8h7can/29168790069.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088705f84b8c---91194728753.pdfIn PDF document text
    • http://dragonera.cn/admin/userfiles/file/18659728856.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bee219c9eb8---93149980391.pdfIn PDF document text
    • http://theleadershipworks.com/PO2/UPFILE/userfiles/files/valofuw.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160cdec2e00f84---44559627994.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608870da02ed8---9950821536.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf6152b536c---segenilugofezozan.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/g6rfikvf4tkijimvibh7deest5/nuduxanomasuxuzegugu.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b291701290b---vaxirasigujafatepojinezi.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b59efcbb68---45977306206.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1607022c2c4d59---jefenapavun.pdfIn PDF document text
    • https://people11people.com/uploads/File/76156244172.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afd5db84dea---nejapopejasurujovi.pdfIn PDF document text
    • http://kimyasaldubeller.com/upload/ckfinder/files/3867497991.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4CD 17776 bytes
SHA-256: 9fad1751caebc221950ab97c39d5896fdca0ae8b81d8567d0d145ac2580200d4
font_01_sfnt_off00012373.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12373 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013b8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B8A 10744 bytes
SHA-256: df3bd4886985bdb046a3cda19fa6f85a83793b6067b05f38be054a898e2acaca
font_03_sfnt_off00015409.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15409 16092 bytes
SHA-256: 9d5144547e0b729630886a3ad3ce48e7da84b0115899dd9c2390406af6f0fecd

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