Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dd68facf49d9cea…

MALICIOUS

PDF

84.7 KB Created: 2021-09-01 16:59:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 033381ad3503652baede0e8ac175f95a SHA-1: 6a46a785d781df1584a5761f9bba99a2210c0e7e SHA-256: 7dd68facf49d9ceace637ffa8bf37906eeb2ffcfe83ac775d1f7e8da7db0e1bb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to various domains, many of which are hosted on compromised CMS upload storage or appear to be part of a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of a phishing lure, aligning with the Spearphishing Attachment technique.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://alnahamgroup.com/userfiles/file/sejamipuranibetubodudu.pdf In PDF document text
    • http://bigpictureresources.com/userfilesbigpicture/file/lorisivupotezajer.pdfIn PDF document text
    • http://stensoproject.com/userfiles/files/30819007988.pdfIn PDF document text
    • http://bharatdarshan.net/rgroup/ckfinder/userfiles/files/gakitenikijekunerare.pdfIn PDF document text
    • https://yodishit.com/uploads/userfiles/file/36018392440.pdfIn PDF document text
    • http://younewstoday.com/task/userimages/file/jaxopavumi.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160993f32d3579---48374610274.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcdfc0427f4---gojala.pdfIn PDF document text
    • https://monographie.com/ckfinder/userfiles/files/21114205315.pdfIn PDF document text
    • http://www.firengo.com/userfiles/files/kodunerixuxumorat.pdfIn PDF document text
    • https://hotnewsmd.deca.md/upload/userfiles/files/30960364505.pdfIn PDF document text
    • http://rolfingnaples.com/clients/a/a5/a5422f62036d2d393d866963e902351c/File/sawumati.pdfIn PDF document text
    • https://sensesgrouphk.com/louis/STARKGROUP/ckfinder/userfiles/files/bovakejemabozuj.pdfIn PDF document text
    • http://traiteur-ribot.fr/userfiles/file/95827541531.pdfIn PDF document text
    • http://splogservice.ru/content/file/46643573411.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/12fc7b155c8440da71fd24f13d4d04f2/watuxuzivuxuzazi.pdfIn PDF document text
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/0183eb559ed3679c0a65b6efd8dfa774/25118311274.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/7f240da96b0bd630447169d52777a151/12030051482.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c5c9f80e23---zotakorater.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/ar2doh93di4p3j3hn0j5fl2jc0/judamux.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a05e15adcb8---fataxotajefexodoxen.pdfIn PDF document text
    • http://www.sname.org.tw/sname/ckfinder/userfiles/files/xekawejazusikosapodunus.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=amplitude+of+pm+wavePDF 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_off0000e120.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE120 19332 bytes
SHA-256: 5bf7374449531901c1e64653fd0cc8d6da93ff305a9857b17b93e0d4f8c6f7bc
font_01_sfnt_off0001140b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1140B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012c22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C22 10520 bytes
SHA-256: 01d2cf31e8227014bf02ccd2ad93cc2bce704663042a1bd9e405737608082ca2

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