Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e08550e0d9a9d0c…

MALICIOUS

PDF

98.0 KB Created: 2021-07-01 13:18:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 9a1713a10aeeab2432b96e52e67f6f2e SHA-1: bc7913416aef82f2bb6bc138daa820915cd10d70 SHA-256: 9e08550e0d9a9d0c055e4d7b8143ad33ec17b133f95d89c1f039a6c3d5e5e1a0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal a link farm pointing to compromised WordPress sites, suggesting a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9898

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://archism.ru/uplcv?utm_term=the+rising+of+the+shield+hero+pdf PDF link annotation
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2cae270767---25801061796.pdfIn PDF document text
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/16098cd2a7c989---wetifomuboziposodef.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160c44b6a75506---11317382227.pdfIn PDF document text
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160881c1b1adb0---49787926320.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/72b5a2d6e4cb32c465222ac00cc39c75/pipad.pdfIn PDF document text
    • http://technestudio.eu/userfiles/files/kipoladaxopor.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160aebeafba4f1---pojupetiboxonukijup.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/505d4cf53aa80731fd50f041dbdbdccf/ledutepibuxufeguwu.pdfIn PDF document text
    • https://steklo-shik.ru/userfiles/file/momipo.pdfIn PDF document text
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/31ce2d4c945488a0c94abb528666b14b/62550743719.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/otchmnt4o0nquphsm29vppnqs6/71441764284.pdfIn PDF document text
    • http://usaoxin.com/userfiles/2021-6/file/655585964.pdfIn PDF document text
    • https://aquafilling.com/userfiles/file/tajufevu.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608ca946ede36---tiwolonotom.pdfIn PDF document text
    • http://akgikorea.com/file_upload/fck_upfile/file/fefaderinuvi.pdfIn PDF document text
    • http://aliceinformaticasrl.com/user/pages/8402110754.pdfIn PDF document text
    • https://protechlighting.com/wp-content/plugins/super-forms/uploads/php/files/574946e89e7e7e851b92b0ae99d8df39/rererirebekupaxoj.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/47b23e7a5ba0de523f47b7c193048e15/pudukijupuzogapowasaxof.pdfIn PDF document text
    • https://carstenrath.com/wp-content/plugins/super-forms/uploads/php/files/r4uqp2omm68vu34p64rkqhiafp/52450472584.pdfIn PDF document text
    • https://www.mds-horizons.com/upload/files/wejizogesikerad.pdfIn PDF document text
    • https://finances-canada.com/wp-content/plugins/super-forms/uploads/php/files/1361a193c6a1a4e1e22781dbd39d0b36/54462275454.pdfIn PDF document text
    • https://agentcctv.com/userfiles/file/kibumaduwi.pdfIn PDF document text
    • http://gleneaglehoa.org/images/file/zebefenesedag.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0DB 13936 bytes
SHA-256: 0ef356fdea80c51270c8d5420b116b70099b895f32d0866412562ae6a391c144
font_01_sfnt_off00011c98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C98 10580 bytes
SHA-256: 7813f42bd8807464337c7a9314795e98a20defc68fa323533e1627aaad9ae87f
font_02_sfnt_off00013473.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13473 17524 bytes
SHA-256: 60831a003c23ba401ca027c0b08a7e576d20e1bd45706dc742c17383c978b59a
font_03_sfnt_off0001623d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1623D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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