Malicious PDF — malware analysis report

Static analysis result for SHA-256 d73c2da404459c90…

MALICIOUS

PDF

70.9 KB Created: 2021-10-01 02:15:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 4b2004ac0636ce1e7756bdaf7cd27f03 SHA-1: a48ac6de91cf1bb3d94d4ff8fd297dd55ffa03eb SHA-256: d73c2da404459c90e9bd064ae4743350b7bc1d6247c16c842e6fd2cf3af6f550
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to websites that appear to be part of a link farm. Several heuristics indicate that these links are hosted on compromised CMS uploads or disposable hosting, suggesting a malicious intent to distribute phishing content or malware. The ML classifier and ClamAV detection further support the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://rosedreamholidayhomes.com/ckfinder/userfiles/files/kerabagasaxe.pdf In PDF document text
    • http://explosivedevices.ru/media/file/61552680876.pdfIn PDF document text
    • https://podiummagazinenews.com/ckfinder/userfiles/files/97581855054.pdfIn PDF document text
    • http://x04ydivan.ru/userfiles/file/nezekes.pdfIn PDF document text
    • https://imihwa.com/uploads/image/20210912/files/20210912133729.pdfIn PDF document text
    • http://barahi.com/assets/userfiles/files/79485575558.pdfIn PDF document text
    • http://daydeothe.vn/rich_editor/file/xomizegigila.pdfIn PDF document text
    • https://viboot.com/ckfinder/userfiles/files/95552044041.pdfIn PDF document text
    • https://mchs.kz/userfiles/File/biwon.pdfIn PDF document text
    • http://rfaaa.com/UploadFile/file/20210920162515631.pdfIn PDF document text
    • http://pro-customer.de/userfiles/file/jeludufa.pdfIn PDF document text
    • http://skrutit-probeg.ru/upload_picture/file/pezawibu.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614d5ea549cfe---84146819915.pdfIn PDF document text
    • https://yifff.se/userfiles/file/33394922561.pdfIn PDF document text
    • http://connect-event.fr/ckfinder/userfiles/files/nupoxutotoxepifaremuz.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/161397720410a4---72860216364.pdfIn PDF document text
    • https://10s317.com/uploads/files/202109140628335613.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/161483f6db30e1---rodogukokagaguzon.pdfIn PDF document text
    • https://www.icicle-mountaineering.ltd.uk/ckfinder/userfiles/files/fututar.pdfIn PDF document text
    • http://naoshima-habitant.com/images/blog/file/kiseloxewebagef.pdfIn PDF document text
    • http://jcsh.bluezp.com/ckfinder/userfiles/files/2531784770.pdfIn PDF document text
    • http://maternites-catholiques.org/ressource/site-image/files/sezufigibegaxonaga.pdfIn PDF document text
    • http://mrukseo.pl/userfiles/file/jixinajopuxokomigamujibu.pdfIn PDF document text
    • https://springkasteelhuren.be/userfiles/file/badepezas.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=p40+lite+e+custom+romPDF 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_off0000b32e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB32E 10424 bytes
SHA-256: 0429c8d1daddc9e119ea5323fb88a3a00d99938abaeedd860388fc8bf7d2a370
font_01_sfnt_off0000cae6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAE6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e2f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2F8 16812 bytes
SHA-256: f808b8a7e4bfd6ae9dd638c20a10e9c4c62a02bc8354c438af8af40512bf4e7d

Open this report in the interactive analyzer, or submit your own file for analysis.