Malicious PDF — malware analysis report

Static analysis result for SHA-256 6adfe65a605dde48…

MALICIOUS

PDF

83.0 KB Created: 2021-09-06 01:44:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: c08b151f460bf3fc126c3a08951182d9 SHA-1: b0f64b78ff52cd865a3134478b15b03c94040838 SHA-256: 6adfe65a605dde48f3321441abf506e3b65afd70b089d130256e9d0d2a41b90f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of links, many of which point to compromised websites or disposable hosting, indicating a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery. No scripts were extracted, but the structure and URL analysis point to a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/i1kiqb3t8up6gh89uca0ro1l86/fubax.pdf In PDF document text
    • http://szsahsh.com/uploads/files/jenitetumigapoja.pdfIn PDF document text
    • https://polandpools.com/contents//files/buxofefis.pdfIn PDF document text
    • http://thepokeluau.com/uploads/files/49375175490.pdfIn PDF document text
    • http://hzzxtl.com/UploadFile/file/20210617183221828.pdfIn PDF document text
    • http://spiregene.com/image/files/20210727_000237.pdfIn PDF document text
    • http://suseefinance.com/userfiles/file/mititiwijutogiwowo.pdfIn PDF document text
    • https://digicpictures.com/downloads/visogamumesimope.pdfIn PDF document text
    • https://saikekanglun.com/filespath/files/20210904025317.pdfIn PDF document text
    • https://tebra.si/userfiles/file/gokerozuvoriviwelama.pdfIn PDF document text
    • https://autotrasportifenoggio.it/file/33954427384.pdfIn PDF document text
    • https://gamedunyasi.com/calisma2/files/uploads/77078723474.pdfIn PDF document text
    • http://bayernglobal.de/userVZ/file/pinirabeginabavafe.pdfIn PDF document text
    • http://banphimchuot.com/userfiles/file/nubudetulujazirikes.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/16075877562.pdfIn PDF document text
    • http://hotelalbicia.com/userfiles/file/1608135646.pdfIn PDF document text
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a1074d83c65---3309441518.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9a7a6dde86---82349372921.pdfIn PDF document text
    • http://kengosushionlineorder.com/uploads/files/51210876116.pdfIn PDF document text
    • https://veterinarycarefoundation.org/userfiles/file/garede.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/160fb6983b04ec---dokalakenopad.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/4259954e97d498a96656719715b20681/bexuvedejidutoro.pdfIn PDF document text
    • http://mebelhotel.ru/userfiles/files/rojonujidabej.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=grammy+awards+2019+winners+list+pdfPDF 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_off0000dc3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC3E 18188 bytes
SHA-256: 967b32936e98cf40b2cbf19087790c6185901d5bda14356dc75a76745c584cd3
font_01_sfnt_off00010ba0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BA0 11240 bytes
SHA-256: 7c935b9a37c94545ba02fba4030b1e63c6bff84af5c0f5adaa3d58d35ef5a5bc
font_02_sfnt_off00012628.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12628 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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