Malicious PDF — malware analysis report

Static analysis result for SHA-256 89250e7b566de091…

MALICIOUS

PDF

81.9 KB Created: 2021-09-04 22:36:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: f90ef563329cf583c4816abcc5f9eab4 SHA-1: 9f65dff0fa80a35d8d3ffca0f13ed2864770a97a SHA-256: 89250e7b566de0911a1408a885a34da95e04d45c63a55048d876486516814047
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or SEO abuse. No scripts were extracted, but the PDF structure and embedded URLs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://wastran.ru/uplcv?utm_term=convert+pdf+to+png+or+jpg PDF link annotation
    • https://suma.ca/upload/editor/file/6214897211.pdfIn PDF document text
    • http://verzorgingsindex.nl/images/uploads/15772164883.pdfIn PDF document text
    • https://alpinebadmintonacademy.com/ckfinder/userfiles/files/tawasidovurofoxunu.pdfIn PDF document text
    • http://doanekeyes.com/userfiles/docs/xoluse.pdfIn PDF document text
    • http://indexone.ru/upload/file/bufawadorijozufopetagikob.pdfIn PDF document text
    • http://www.gyndoktors.de/ckfinder/userfiles/files/jajujukeja.pdfIn PDF document text
    • https://underworldgear.com/upload/users/files/dananatubisija.pdfIn PDF document text
    • http://igigeothermal.jp/userfiles/file/dujaxuvo.pdfIn PDF document text
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/b6eeb1d8815f0c10e3871232c9b30447/77098165929.pdfIn PDF document text
    • http://matraholding.hu/images/userfiles/files/95673197383.pdfIn PDF document text
    • https://52fantasies.com/home/holly/public_html/ckfinder/userfiles/files/88684070811.pdfIn PDF document text
    • https://airtelco.com/data/users/_/email/files/larerotuwagoxenebowasexo.pdfIn PDF document text
    • http://hzjksj.com/images/upload/File/pazawoxezixo.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076fb3354ba2---sowufigises.pdfIn PDF document text
    • http://paitoonbox.com/userfiles/files/zefudunimisojiripe.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6463471ed1---lipapogujo.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e82db03a2cc---14854215465.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098850bbf1ac---xegisukirunojewelobipev.pdfIn PDF document text
    • http://kripasec.com/userfiles/file/62565613235.pdfIn PDF document text
    • https://tese.in/ckfinder/userfiles/files/25765891442.pdfIn PDF document text
    • https://aspirans.com/files/file/80254523005.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/ed44aac1f6ff988d3ffe17f8ea31c0e3/nogatebajed.pdfIn PDF document text
    • http://sosnovgeo.ru/userfiles/file/megituzel.pdfIn PDF document text
    • https://naoshima-habitant.com/mewidutekesaxegodim.pdfIn PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/160f98dce83dea---9263213307.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB9E 18256 bytes
SHA-256: 46990baf4f5f5a5bbdb466d222c34afba4a878c3a1468c8e26a267044d50f329
font_01_sfnt_off000109f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109F7 10432 bytes
SHA-256: 343169eb6c4e415298c0a8aa3d3a3a89e989375305a0a6b4684144a2bd44ad7d
font_02_sfnt_off00012197.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12197 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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