Malicious PDF — malware analysis report

Static analysis result for SHA-256 a93375278a637b57…

MALICIOUS

PDF

101.1 KB Created: 2021-06-28 19:28:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: b8aec8a2608e0b1002b7a464c792a840 SHA-1: 8487a439f71749de1afd759d5787a6eeeadd94ff SHA-256: a93375278a637b5733180ac2f8e8bd845940da020ff56fb77e1c5b7a42152cfe
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to compromised CMS upload directories. These links likely serve as lures for phishing attacks or to distribute further malware payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9803

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://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/8ofgim7kgfbja3qvhkieufnpn4/95678655101.pdf In PDF document text
    • http://fw-simple.com/uploads/files/vupikixad.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/1609604cd516d4---49577225302.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b81052b567---guxedixapepevetigo.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7eda975f21---7275961643.pdfIn PDF document text
    • http://visit-pune.com/userfiles/file/memirap.pdfIn PDF document text
    • http://aj-logistics.com/stock/userfiles/file/61038846820.pdfIn PDF document text
    • http://whs1963.com/clients/7/75/758a827d59fb1c2827eec60421ffdc22/File/25230692639.pdfIn PDF document text
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/m8bapggb51qijue24tt1ussh71/vovikosulisoxusegisofuzid.pdfIn PDF document text
    • http://ahrestygz.com/userfiles/files/20210627_065117.pdfIn PDF document text
    • http://xn----8sbxab3abskk3a2j.xn--p1ai/media/file/nevoxadejatawegupipotexim.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afb91056726---1594021126.pdfIn PDF document text
    • http://buddhavehicle.com/userfiles/file/nunukejudekumulapa.pdfIn PDF document text
    • https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/6f145dc2d8189e5a21562c3a2579c544/90336997575.pdfIn PDF document text
    • http://sevinctekstil.com/resimler/files/mamubokilubewin.pdfIn PDF document text
    • http://www.knickmeier.net/images/pageimg/file/82047310731.pdfIn PDF document text
    • http://edgecs.net/documents/67695853414.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/16098b33b55395---39648727717.pdfIn PDF document text
    • http://myconnect-thailand.com/image/upload/File/puzuf.pdfIn PDF document text
    • http://theettiaresmontreal.com/clients/f/f0/f03dfc1790708d0b03c48e9879ef2ea6/File/sabomijakebozomanoxirova.pdfIn PDF document text
    • https://earplighting.com/wp-content/plugins/super-forms/uploads/php/files/ab8ccf0e4db94cd2b78adfbf1224c379/92746248448.pdfIn PDF document text
    • https://chiataiec.com/userfiles/Proj_Name//files/nabikodofosekesadubur.pdfIn PDF document text
    • https://vandolderskb.com/images/usr/96578441239.pdfIn PDF document text
    • http://atut-biuro.com/uploaded/file/medurowutozo.pdfIn PDF document text
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/b44819b99896e134225356b864631c84/bevuwozofeberuropuror.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=textbook+of+medical+microbiology+pdfPDF link annotation
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/24995b5ab07949a0d05156ae92bb6aea/38400718735.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_off00012720.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12720 17748 bytes
SHA-256: 17a4415e121962719b47339f90d5f76063072b5dce4e2a1f3ef48ccc27668eb7
font_01_sfnt_off00015550.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15550 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00016d67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16D67 11104 bytes
SHA-256: 986e8822e1fc16f27cb837c4c2fa810531d6de6c490d410298e99a5fb8e6f90b