Malicious PDF — malware analysis report

Static analysis result for SHA-256 06211c7f2c662ff7…

MALICIOUS

PDF

79.8 KB Created: 2021-09-19 15:32:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 33bba33819812eabe638fe5cd458d0a7 SHA-1: b3430dc545d46db39a11cc8c5d9b199d3eb651d7 SHA-256: 06211c7f2c662ff7d5ef465bbd441d7b21c7134201697a35b94156caefceb911
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which are associated with link farms and disposable hosting, indicating a phishing or malicious redirection scheme. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing lure, likely attempting to direct users to malicious websites for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 5

  • 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.
  • 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://huntic.ru/uplcv?utm_term=sociology+book+for+bsc+nursing+2nd+year+pdf PDF link annotation
    • https://iveducentar.com/uploads/assets/file/javiv.pdfIn PDF document text
    • https://livredart.com/ckfinder/userfiles/files/22721926160.pdfIn PDF document text
    • http://xn--b1adbbbaeqjtsflbfms0e.xn--p1ai/pict/file/68079942732.pdfIn PDF document text
    • https://mangallagn.com/images/file/66868646183.pdfIn PDF document text
    • https://deepex.hu/hirek/files/58748431657.pdfIn PDF document text
    • http://thuexedanang247.com/uploads/image/files/mekixewegawusoteg.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/1613e69d28bc09---943269747.pdfIn PDF document text
    • http://szpk.hu/_user/file/43577485885.pdfIn PDF document text
    • https://mekongtransport.com/upload/userfiles/files/370506322.pdfIn PDF document text
    • http://koopmankennedyfeller.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xejizuv.pdfIn PDF document text
    • http://xahscw.com/userfiles/file/meparifo.pdfIn PDF document text
    • https://groupekineconcept.com/userfiles/file/ninipopowojojuwego.pdfIn PDF document text
    • https://boucherienabli.com/uploads/FCK_files/file/wexeladomugipuwekajole.pdfIn PDF document text
    • https://sibservis.com/ckfinder/userfiles/files/90439111277.pdfIn PDF document text
    • https://yuvasarkar.org/userfiles/file/fonabemagiferani.pdfIn PDF document text
    • https://skvacations.com/userfiles/file/mubiwawujatijofar.pdfIn PDF document text
    • http://chaputlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/mirorogakexotigu.pdfIn PDF document text
    • https://12tiga.com/contents/files/jotoseku.pdfIn PDF document text
    • https://pomacanthe-art.fr/imagebeforeafter/files/vokutenarapaxupamozirukiz.pdfIn PDF document text
    • http://pathtojanna.com/userfiles/files/13335855682.pdfIn PDF document text
    • http://poledance-chrudim.cz/files/file/71446162152.pdfIn PDF document text
    • http://stellamaris.cz/userfiles/vefinemaka.pdfIn PDF document text
    • http://urbanconstructions.org/images/uploadedimages/file/vojijubepakat.pdfIn PDF document text
    • 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_off0000d436.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD436 16460 bytes
SHA-256: 49365b17fa8351ce6747a595d6972cd530970204bf5c01f3128987108d4af339
font_01_sfnt_off0000fea9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEA9 11336 bytes
SHA-256: 72f79f7d88f248e7566c9b21735c3470f8913ed81982391f83ffaf0c2452dfa2
font_02_sfnt_off00011918.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11918 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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