Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f8b519555eec809…

MALICIOUS

PDF

82.8 KB Created: 2021-09-03 11:09:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: aa4f2291c7eb5eb857771c899e9cf6a4 SHA-1: 9eea520e687beb5cbbec093f45d1a65373421b78 SHA-256: 0f8b519555eec8090c716c59c4461f78b910bd109d7ae9312ae19a57402bd2e3
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or appear to be part of a link farm designed to obscure the true destination. Heuristics indicate these are likely part of a phishing or redirection scheme, aiming to lure users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://www.gasserbush.com/wp-content/plugins/super-forms/uploads/php/files/e0691751c65f8ae897dc508719e3c926/80305105828.pdf In PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1609b17481f3b7---firutavonugazusukon.pdfIn PDF document text
    • https://careersourceokaloosawalton.com/files/public/23447966595.pdfIn PDF document text
    • http://cephedanismani.com/images/pages/file/lafenawodiv.pdfIn PDF document text
    • http://allasclub.com/campannas/file/xixokeditegatadasezivemo.pdfIn PDF document text
    • http://studiomalpocher.it/userfiles/files/mizevup.pdfIn PDF document text
    • https://leise.ru/admin/ckfinder/userfiles/files/dakikojawosibumebejovib.pdfIn PDF document text
    • http://aqs-group.it/userfiles/files/65208466719.pdfIn PDF document text
    • https://auto-rujo.com/images-editor/file/fogelutes.pdfIn PDF document text
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/8ij88k2ic6cicuib6k846eih3f/pufilivowibotojorudoxix.pdfIn PDF document text
    • https://bitree.com/ckfinder/userfiles/files/towepogemikuk.pdfIn PDF document text
    • https://fleuriste79.fr/ckfinder/userfiles/files/pipibuxugezamos.pdfIn PDF document text
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d96c4b7207b---57885810500.pdfIn PDF document text
    • https://100tmt.com/uploadimage/files/20210623062128.pdfIn PDF document text
    • https://rugsdirect4u.com/uploadedfiles/file/18936730138.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/1c26b95ede2fe909ded835f6494bef61/30762290541.pdfIn PDF document text
    • http://abwlanham.com/uploads/files/20969762114.pdfIn PDF document text
    • https://hawkseyetravels.com/assets/ckfinder/userfiles/files/bodoputapebosigumum.pdfIn PDF document text
    • http://urparitet.ru/admin/ckfinder/userfiles/files/1011176102.pdfIn PDF document text
    • http://networkinglikepro.com/ckfinder/userfiles/files/migaverelasapibugezoped.pdfIn PDF document text
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/d918134dcc22272d02c4c75c9c150cc4/bofizisivukaxinovod.pdfIn PDF document text
    • http://herve-coiffure.ci/files/vuvoranaripalegidat.pdfIn PDF document text
    • http://ettermanenterprises.com/ckfinder/userfiles/files/63464907049.pdfIn PDF document text
    • http://tiwtactic.com/userfiles/files/mudovi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=2008+mazda+3+manual+transmission+fluid+capacityPDF 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

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_off0000dc54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC54 17548 bytes
SHA-256: 0357c28789e59771e3d42b16986b04a2fb174f218eecd8f1c6ff839d99514ddb
font_01_sfnt_off000109f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109F7 11448 bytes
SHA-256: babcb6363599854353eed0d07d038dae3adb832726874c998b21548998c34b2d
font_02_sfnt_off00012527.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12527 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.