Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7209bb4c22546a9…

MALICIOUS

PDF

81.1 KB Created: 2021-09-17 07:32:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: c4cdf948077921480b0bde4ec20a0a4a SHA-1: 7d1cdff2404df474fd18be48b7d48424a0f07a93 SHA-256: e7209bb4c22546a99615cf4de176975287eb16b1c02b4297fbde2d6708594932
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many pointing to disposable domains, suggesting a link farm or phishing lure. The presence of embedded JavaScript, flagged by heuristics, indicates potential for malicious scripting. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent, likely to redirect users to malicious sites for credential harvesting or malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. 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://indago-rovigo.it/userfiles/files/goxerisilida.pdf In PDF document text
    • http://mibenjamin.com/userfiles/file/peniza.pdfIn PDF document text
    • https://www.asoriofrio.org/ckfinder/userfiles/files/kepukajodisagevepexakobaz.pdfIn PDF document text
    • https://gamedunyasi.com/calisma2/files/uploads/36020535419.pdfIn PDF document text
    • https://classykitchen.pl/web/uploads/files/42179597702.pdfIn PDF document text
    • https://marlin-aquarium.ru/ckfinder/userfiles/files/21651565299.pdfIn PDF document text
    • http://jawarakreasi.com/file/ravonomosaluxijafe.pdfIn PDF document text
    • http://immobilieninvestors.net/userfiles/file/xavukaba.pdfIn PDF document text
    • https://inprovitbrasil.com/ckfinder/userfiles/files/61998802462.pdfIn PDF document text
    • http://xyr59.com/filespath/files/20210903234420.pdfIn PDF document text
    • http://usarsenal.it/userfiles/files/70695548029.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/7bc7f16eda69b457dfcbca6b1a52d43c/xiferudelezufobiso.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131015feba9a---wububabusu.pdfIn PDF document text
    • http://ambvetfanini.eu/userfiles/files/govemuwagoxunamitafinud.pdfIn PDF document text
    • http://vidiniaibreketai.lt/userfiles/file/71633931898.pdfIn PDF document text
    • https://buzascsaba.hu/userFiles/file/rudarezobozaxijofamuxab.pdfIn PDF document text
    • http://lonniestireandauto.com/nbloom/fckuploads/file/lotedakegujid.pdfIn PDF document text
    • http://carscaso.com/js/upload/files/fuzufa.pdfIn PDF document text
    • https://delphin-bau.com/ckfinder/upload/files/jozonabiwo.pdfIn PDF document text
    • http://logistra.fr/ressource/site-image/files/lopuvatopefoma.pdfIn PDF document text
    • http://edins.net/userData/ebizro_board/file/26579917683.pdfIn PDF document text
    • http://mikomisushiwc.com/uploads/files/10714801210.pdfIn PDF document text
    • https://volpatoebrum.com.br/_common/admin/scripts/ckfinder/userfiles/files/62928734990.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=cricket+97+for+androidPDF 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_off0000d9bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9BD 17200 bytes
SHA-256: 909a422cd6b5bdd6fb609eed96356aa60653ad6334cbf8ee745393e9938f033c
font_01_sfnt_off00010678.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10678 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011e8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E8F 10596 bytes
SHA-256: 6c354ba5f686d4efd5789c03e795541371b74796bb2d395900e318769cfac692

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