Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc393f92767d4e6e…

MALICIOUS

PDF

78.2 KB Created: 2021-07-04 12:08:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: a6daa5b48ebb69228a3bd203c39f9aa3 SHA-1: c13538134eb08686abc604fe38bdd39deb8879e5 SHA-256: bc393f92767d4e6e1ea55631da53870b0f618e3dceb85d962f5b8ab7894d65ea
156 Risk Score

Malware Insights

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

The sample was identified as malicious by ML classifiers and ClamAV, indicating it's a phishing or trojan delivery mechanism. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a link farm designed to redirect users. The PDF structure and embedded links are indicative of a spearphishing attachment used to deliver a secondary payload or redirect to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606e1014232e7---74211142519.pdf In PDF document text
    • http://hzzxtl.com/UploadFile/file/20210623204914157.pdfIn PDF document text
    • https://lawyerupsmart.com/tempimg/file/91382843897.pdfIn PDF document text
    • http://samtle.net/ckupload/files/6139711946.pdfIn PDF document text
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/o6u7reu237te7daj1mosk4fssk/keserefupina.pdfIn PDF document text
    • http://escqatar.com/uploads/userfiles/file/file/94275889779.pdfIn PDF document text
    • http://yaqeen-eg.com/userfiles/file/19925649241.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d43c5e2d429---25678493804.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b2f7e18f34---dumajuxadezuwibajujo.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607ef57d9ec96---47741505253.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b22d1fd639b---18030144163.pdfIn PDF document text
    • https://uppersanduskyrotary.com/cms/files/File/wokisokoxolovopipabinokaj.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1607b6930594a9---zulebagegu.pdfIn PDF document text
    • https://adasms.fr/userfiles/file/20710493750.pdfIn PDF document text
    • https://ecobox.eng.br/wp-content/plugins/super-forms/uploads/php/files/o6jb5eq5scp29c000olbh6j9ht/73615359795.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/vifewurelaz.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/70h115csh6i9ncfgvke8e3673e/jusedokulokopazigojaw.pdfIn PDF document text
    • http://trungtinjsc.vn/upload/FCK/file/gimiwobosubimelef.pdfIn PDF document text
    • http://seanmore.com/userData/board/file/wajakilosa.pdfIn PDF document text
    • https://dangeloremodeling.com/nbloom/fckuploads/file/93066205327.pdfIn PDF document text
    • https://www.aceitedeoliva.com/wp-content/plugins/super-forms/uploads/php/files/be8e1ca4da49626644bbd8f8f228737e/35478176949.pdfIn PDF document text
    • https://dmvassociates.com/wp-content/plugins/super-forms/uploads/php/files/bf9cc4b71994bb358902bcee13fb9699/tuxilebememasavo.pdfIn PDF document text
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b259c483340---tidakekitojebazagode.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=brazilian+real+todayPDF 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_off0000d223.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD223 16296 bytes
SHA-256: 0e0b8a84bab433524f6932217c61915796225a96168914c7fe8132db2cb629cd
font_01_sfnt_off0000fc74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC74 10300 bytes
SHA-256: 7be4b8cb23262e17778128812e372c4c35970f695f8f43ea1554253c17130180
font_02_sfnt_off000113d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113D2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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