Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcab2ad423fd64a3…

MALICIOUS

PDF

79.4 KB Created: 2021-09-19 00:47:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 208f73f13f5a042b172c634b1fd7dad2 SHA-1: 941ba654cb2c486ee625cda5c63f7ed63a59f230 SHA-256: fcab2ad423fd64a3e625a69f68f0c6a1ec6bc2f063d5aad03ab8a392ce41b29f
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable hosting and are structured as a link farm, a common tactic for distributing malware or conducting phishing. The presence of embedded JavaScript, flagged by heuristics, suggests the potential for malicious code execution within the PDF. ClamAV detection and ML classification further support its malicious nature, indicating it's likely a phishing or malware delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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.
  • 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://omegapizza.net/uploads/files/kodorapikox.pdf In PDF document text
    • https://zohopinler.com/calisma2/files/uploads/54620367979.pdfIn PDF document text
    • http://cp-1.ru/userfiles/files/jubomidofebunedetili.pdfIn PDF document text
    • https://appvid.eus/userfiles/files/12725427839.pdfIn PDF document text
    • http://www.novosib-sport.ru/ckfinder/userfiles/files/74123072673.pdfIn PDF document text
    • http://life-worldwide.org/assets/uploads/files/kukavekutiponakivolajej.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ac23046246---88146475097.pdfIn PDF document text
    • https://chezgregoire.fr/userfiles/lubenowezavikogobana.pdfIn PDF document text
    • http://maihome.hu/admin1/file/61564919334.pdfIn PDF document text
    • http://zkojicin.cz/userfiles/file/jijor.pdfIn PDF document text
    • http://bigbulkbags.ahmadpackages.com/survey/userfiles/files/80997498957.pdfIn PDF document text
    • http://tanabuauto.com/js/upload/files/16234663894.pdfIn PDF document text
    • https://nirmalujjwal.com/public/ckfinder/userfiles/files/xefilemexapivafozelef.pdfIn PDF document text
    • http://needychild.org/ckfinder/userfiles/files/doxedanulosifubiwalub.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/161391dc353c95---nerizivekinepof.pdfIn PDF document text
    • http://savitaco.com/uploads/images/files/10823505938.pdfIn PDF document text
    • https://etre-cheval.fr/Applications/MAMP/htdocs/etre%20cheval/news_pix/file/podifanujosoxuvu.pdfIn PDF document text
    • https://ofly.om-digitalsolutions.cn/upload/files/37494112639.pdfIn PDF document text
    • https://mobilieroccasion.fr/uploads/file/93938750891.pdfIn PDF document text
    • http://sloplast.com/userfiles/files/52211309812.pdfIn PDF document text
    • https://elsa-daulte.com/ckfinder/userfiles/files/pukosomer.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/161457db33da9f---linunesuzezubopuzesu.pdfIn PDF document text
    • http://pensionpoint.cz/userfiles/files/84034276218.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/1613c937467c9e---purajinizof.pdfIn PDF document text
    • https://fier-forjat-valimet.ro/ckfinder/userfiles/files/32934220592.pdfIn PDF document text
    • http://stringquartet.biz/web/images/fck/file/71343870256.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=negative+cotangent+graphPDF 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_off0000cd4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD4C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e563.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE563 10480 bytes
SHA-256: f42855f12eb1b0ef190b4b87765b6e823ac18d2859d64a95251ebcde8328bf1e
font_02_sfnt_off0000fd2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD2C 19052 bytes
SHA-256: 93ddf99beeebe1f192388c01413b7cf8f57bea947d3905dfb2c3cf7abb63e844

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