Malicious PDF — malware analysis report

Static analysis result for SHA-256 562840c6aaa7dbc0…

MALICIOUS

PDF

84.7 KB Created: 2021-08-03 01:11:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: c95bcd89c130d5ca826c0361c802c672 SHA-1: 9f427a9dbb077f6765977caeb471ea35769a50c6 SHA-256: 562840c6aaa7dbc02e43532809db3010187a4f9c37345fcb91ad252d4f1f6092
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. No scripts were extracted, and the document body was unreadable binary data, so the attack pattern is inferred from the URL structure and heuristic firings.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://huntic.ru/uplcv?utm_term=asus+t100+webcam+driver+windows+10 PDF link annotation
    • http://bjjiffy.com/upload/lawokoto.pdfIn PDF document text
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/48907d82c8ce14409e15ed306a36aa25/dowidapozodunawiguxafono.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/h4g2m1ldhbat696rgomlacku3s/tutozivokejebatavotodimul.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/cf7e745305af4d0940c0148002757921/rubebojufedevogasaseni.pdfIn PDF document text
    • http://kanchanaspa.com/ckfinder/userfiles/files/53511275629.pdfIn PDF document text
    • http://rinsacars.com/files/others/depawujevitomojezakedexom.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce55b01b8c---73775796204.pdfIn PDF document text
    • https://rotitelor.com/contents//files/tatolifitagikinikojiseji.pdfIn PDF document text
    • http://chinoboxingclub.com/clients/36032/File/26816477564.pdfIn PDF document text
    • http://bendhigh1970.com/clients/1/10/106e6567aa8bd3cecf4080670b11bd10/File/zejojub.pdfIn PDF document text
    • http://www.kickcommerce.com/userfiles/file/93967745457.pdfIn PDF document text
    • http://analogsys.com/uploaded/file/1622479091608d419350931.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095493e832be---zakilanisuxelotipoba.pdfIn PDF document text
    • https://dildendilecevirievi.com/upload/ckfinder/files/zewoduzubojokuk.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608f5ed690907---nixutijakiwikemodiva.pdfIn PDF document text
    • https://www.eoluk.com/wp-content/plugins/super-forms/uploads/php/files/1jtmt6t4pd475kb2s6k4pu41m3/81062354766.pdfIn PDF document text
    • http://angarakshaksecurity.com/userfiles/file/81753220252.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c3997229955---36743929911.pdfIn PDF document text
    • https://turbooto.vn/upload/files/fivamepuwesiwurum.pdfIn PDF document text
    • https://hojoairport.com/images/file/mixopane.pdfIn PDF document text
    • http://pogotowienaukowe.com/Upload/file/55754242490.pdfIn PDF document text
    • https://msr-hudsonproperties.com/wp-content/plugins/super-forms/uploads/php/files/aaff6b0725fdf62a674170918fa83253/pufujodukuriluki.pdfIn PDF document text
    • http://bobmeetin.com/media/galleries/files/23210078793.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_off0000e460.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE460 17712 bytes
SHA-256: 53db584902e2b04a0b7c965d7528beb8cf044f94c50f4e7a3949c0e9be891626
font_01_sfnt_off00011317.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11317 11032 bytes
SHA-256: 58c164a91fc32a82b2af94f2f49c150692b7c86e8d5d329ae326080804c3271a
font_02_sfnt_off00012ce6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CE6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1