Malicious PDF — malware analysis report

Static analysis result for SHA-256 47abf70642ebf7fc…

MALICIOUS

PDF

78.9 KB Created: 2021-09-13 13:49:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: edf3a69a24b0610a89cc311de15af76b SHA-1: 78d07f967e6df9a8ab9c77ea08f659439c0481af SHA-256: 47abf70642ebf7fce87e352bfe4c1a9bd38a1c5568783505286da8b887a7315a
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many hosted on disposable domains, and a heuristic indicates it's a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a common phishing lure designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://queure.ru/uplcv?utm_term=convert+rtf+to+pdf+mac PDF link annotation
    • https://www.hs-hofgastein.salzburg.at/ckfinder/userfiles/files/36147433161.pdfIn PDF document text
    • http://tienhasteel.com/app/webroot/upload/files/99990761840.pdfIn PDF document text
    • http://juditphotography.com/picture/userfiles/file/17033226335.pdfIn PDF document text
    • https://auto826.vnpec.xyz/uploads/files/fazerufafupupi.pdfIn PDF document text
    • http://educaholistica.com/resources/img/imagesck/files/54513683059.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161308684874e1---kizevig.pdfIn PDF document text
    • http://krajinar.cz/soubory/files/nuvijinitenenib.pdfIn PDF document text
    • http://nhatrangpalacehotel.com/app/webroot/upload/files/vezaribedebirewaluxabo.pdfIn PDF document text
    • http://yyfxsw.com/upload/files/gisewusupunujig.pdfIn PDF document text
    • http://telekommarketing.com/firme_data/files/66878195412.pdfIn PDF document text
    • http://dioceseofniranam.org/userfiles/file/82585914195.pdfIn PDF document text
    • https://inprovitcolombia.com/ckfinder/userfiles/files/92078632775.pdfIn PDF document text
    • https://soudurelausiere.com/upload/editor/file/7852398824.pdfIn PDF document text
    • http://dralituncer.net/userfiles/file/ximugina.pdfIn PDF document text
    • http://cmrivestimenti.com/userfiles/files/ginokav.pdfIn PDF document text
    • https://bharatiyabhashaparishad.org/ckfinder/userfiles/files/84034193807.pdfIn PDF document text
    • http://refpecsbelvaros.hu/kepek/files/54625233322.pdfIn PDF document text
    • http://ndt-tl.ru/upload/file/mirulaketaxiwufubobilo.pdfIn PDF document text
    • https://butagallery.com/userfiles/files/12271427628.pdfIn PDF document text
    • http://clair-environnement.eu/catalogue_dynamique/file/1309026072.pdfIn PDF document text
    • http://alarm.pl/userfiles/file/39407994182.pdfIn PDF document text
    • https://wecareu.net/ckfinder/userfiles/files/18913372046.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_off0000d0f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0F3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e905.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE905 17416 bytes
SHA-256: ad4491259ecbf165edc6598ee74c408f10b0ff6806487aaae63389772e610e73
font_02_sfnt_off0001162a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1162A 10572 bytes
SHA-256: a49ba7d8f427a3b6417d9a9b34d9720c1166e5d1564133870c9716e44efe2dc4

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