Malicious PDF — malware analysis report

Static analysis result for SHA-256 6362d76350c2d35c…

MALICIOUS

PDF

88.4 KB Created: 2021-09-08 18:36:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 49a1fce6869333b9e14d72414e424950 SHA-1: e7f73e147236f5726ae806267e1b8d28ab32f532 SHA-256: 6362d76350c2d35c191cef37f53d915efd8f7d0c2455606845d45621f7bfa6e7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised websites or link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with a malicious document designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://cructi.ru/uplcv?utm_term=gardena+water+timer+manual PDF link annotation
    • http://vcelari.naceradec.cz/includes/ckfinder/userfiles/files/75405229813.pdfIn PDF document text
    • https://jagamimpi.info/contents/files/2576718944.pdfIn PDF document text
    • http://pokeocncafe.com/uploads/files/47222801749.pdfIn PDF document text
    • http://ellenia3.eu/userfiles/files/sominoxisaraxesoxekop.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132978e63944---40106812490.pdfIn PDF document text
    • https://aquatrustfina.com/userfiles/file/kaxodim.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1612fc89d4f92a---gatiranubilitijuvi.pdfIn PDF document text
    • http://autoneza.cz/UserFiles/File/ziwafa.pdfIn PDF document text
    • http://ssaisarang.com/ckfinder/userfiles/files/vopax.pdfIn PDF document text
    • https://pediatricpotentialsnj.com/PP/PPpng/files/gufelixunofofaz.pdfIn PDF document text
    • http://unityproductions.com/upload/files/50234165185.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/a097f99a026b63f03f7e46ece3f19e3b/36748342506.pdfIn PDF document text
    • http://jaatkinson.com/userimages/kodek.pdfIn PDF document text
    • http://jaluzipro.ru/public/userfiles/file/11664188781.pdfIn PDF document text
    • https://e-casainteligenta.ro/userfiles/file/554382061.pdfIn PDF document text
    • http://chafewyuok.handysociality.com/upload/files/makutasoj.pdfIn PDF document text
    • http://allineers.morefriendship.com/upload/files/86669453105.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/161377b5194e4f---45283041821.pdfIn PDF document text
    • http://peggylittlelawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/vabemenagolorepotigozob.pdfIn PDF document text
    • https://literie-depot.fr/UserFiles/file/56856829200.pdfIn PDF document text
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/fabf161630370d3a4bea26cf90c743a6/80388228410.pdfIn PDF document text
    • http://gorsilawfirm.com/userfiles/file/bupalixe.pdfIn PDF document text
    • http://gurolmumcu.com/userfiles/file/39686640996.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_off0000f04e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF04E 19416 bytes
SHA-256: 0cf3e858280bf1a3e263d16033214fc697562394ac32e49bf8a0d72cb79b0e9b
font_01_sfnt_off00012450.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12450 10348 bytes
SHA-256: 544d78c0bcbab5217544999b2820cd4ca2ad569458ed94c2dd52d61b63cedf10
font_02_sfnt_off00013baf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BAF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1