Malicious PDF — malware analysis report

Static analysis result for SHA-256 7480447e7afcb9df…

MALICIOUS

PDF

81.9 KB Created: 2021-09-05 01:10:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 31998c01e9bc353434cd1a90d109740d SHA-1: 4bacdc1d0b76c813265221b74501e7b329c57db5 SHA-256: 7480447e7afcb9dfb6a02ffc8f8e5f94c8519377f0784d743745d4b78f9d82fb
164 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript which is a common technique for executing malicious actions. The heuristics indicate this JavaScript is used to redirect to a link farm hosted on compromised CMS uploads, suggesting a phishing or malware distribution lure. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 7

  • 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.
  • JavaScript action low PDF_JAVASCRIPT
    PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://thienlongadv.com/upload/files/13562792439.pdf In PDF document text
    • http://tubemakingmachine.com/uploadfile/files/3186069927.pdfIn PDF document text
    • https://faktxeber.ru/resimler/files/9416901227.pdfIn PDF document text
    • http://globaltruthmediagroup.com/clients/a/aa/aa8380eac451876ae6ab993bf3a720d6/File/metisanelamek.pdfIn PDF document text
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/ab638008bc32864e60bf0d0c02f95ccc/71595029274.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089eee8a919a---10339561555.pdfIn PDF document text
    • http://stadtbild-intervention.de/Quansis/ckfinder/userfiles/files/womunamunesajiradi.pdfIn PDF document text
    • http://evola.it/userfiles/files/jutujumuto.pdfIn PDF document text
    • http://vladjurnalist.ru/archive/file/xifamevel.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a9e8cc66cbd---83320793298.pdfIn PDF document text
    • http://grandviewgroupresort.com/upload/files/fijusomasam.pdfIn PDF document text
    • https://taperagi.com/contents//files/bepenigimiwuvemadipogum.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133cafd1f7de---17652062978.pdfIn PDF document text
    • http://parkwaywest1974.com/clients/861606/File/dipevonudarisilexol.pdfIn PDF document text
    • http://tko.wavedev.net/img/files/files/dedagadazofinoxumu.pdfIn PDF document text
    • http://sevimticaret.net/userfiles/file/bosiduvisezuvo.pdfIn PDF document text
    • https://conexusinternational.com/ckfinder/userfiles/file/kogijadilipepadenam.pdfIn PDF document text
    • http://kbchina.de/upload/tuzubib.pdfIn PDF document text
    • http://fundacjaproartis.pl/javascript/ckfinder/userfiles/files/mebiposu.pdfIn PDF document text
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/18f0e12c4f43ae216bfb6533bd46ff27/pakox.pdfIn PDF document text
    • https://muratay.nl/userfiles/file/89206058875.pdfIn PDF document text
    • http://www.giuseppe.ru/ckfinder/userfiles/files/37125040228.pdfIn PDF document text
    • http://bscartridge.com/pic/93819955011.pdfIn PDF document text
    • http://terezmisszio.eu/files/file/jixunotolukowaxome.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=requirements+elicitation+and+analysis+pdfPDF 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_off0000d981.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD981 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f193.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF193 17868 bytes
SHA-256: ded08cf2958ca1486e348a136faf1586c95085557fc2fd7f97e6fd69c5f98a6c
font_02_sfnt_off00011fde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FDE 11188 bytes
SHA-256: 117d94a7e9176428eaad796a6d6988e828b0023da31c45c660d97af14856778c

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