Malicious PDF — malware analysis report

Static analysis result for SHA-256 1918f7252aa8640a…

MALICIOUS

PDF

69.7 KB Created: 2021-10-02 15:34:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-22
MD5: d2bd0a7a6402c75da77ebe0daaade227 SHA-1: 4c99a4e81017791d293b929b7a87b60f67503cb7 SHA-256: 1918f7252aa8640ac611651cbcdb63edeb8c6cca7932e4e4dc925c8ce2c42020
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://ritadas.in/userfiles/file/werovejuvefar.pdf In PDF document text
    • http://119pump.net/d/files/jejuniwozewazas.pdfIn PDF document text
    • https://nikunjfoundation.org/ckfinder/userfiles/files/31562286275.pdfIn PDF document text
    • http://seamacros.com/upload/file/7408975527.pdfIn PDF document text
    • http://turagent007.ru/userfiles/file/49735234661.pdfIn PDF document text
    • http://eurogeographyjournal.eu/admin/fckfiles/file/rerupinojemuzog.pdfIn PDF document text
    • https://haidangpc.com/contents/files/12009854244.pdfIn PDF document text
    • https://croatia-flyfishing.com/files/28304985561.pdfIn PDF document text
    • https://olterus.net/contents/files/fegasifodapodax.pdfIn PDF document text
    • http://bukharajohnscreek.com/sites/default/files/file/82778428274.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16134233c897cc---31346547987.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1614144e04f43c---nuwivunori.pdfIn PDF document text
    • http://probeg2000.ru/files/userfiles/files/galuzopawiki.pdfIn PDF document text
    • http://megatex-plast.ru/pub/file/54176121969.pdfIn PDF document text
    • http://wsm.hk/images/files/tasadisixosubozokepodiku.pdfIn PDF document text
    • https://stillwaiting.org/userfiles/file/nabiwiduwaxal.pdfIn PDF document text
    • https://nada70.org/userfiles/file/kinuvupowepejemube.pdfIn PDF document text
    • https://gs-hemeringen.de/ablage/userfiles/files/79198280279.pdfIn PDF document text
    • https://llc-sahara.com/site/files/tapilugidakora.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16143984222e92---dupusebudesiro.pdfIn PDF document text
    • http://redskap.ru/userfiles/file/palivojexitezut.pdfIn PDF document text
    • http://riph.pl/userfiles/file/zodezusisug.pdfIn PDF document text
    • http://interface-referencement.com/userfiles/file/sofovu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=given+a+graph+find+the+functionPDF 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_off0000b264.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB264 14964 bytes
SHA-256: 8756284a48f94f6f158ad5e015b5f167efce65c22729aecc4f19228017af09f8
font_01_sfnt_off0000d83c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD83C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f053.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF053 10892 bytes
SHA-256: b2edac9c265cb815a7c5f3a6bf87b64f7568a21b91a9d88e30275e0231b7212b