Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1230f28cb49e1d4…

MALICIOUS

PDF

80.7 KB Created: 2021-09-13 23:31:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 09299a834e8be455d22ffc11ab670e9a SHA-1: 445f921fe8cd0987cf3a75c41bbed90cc5902211 SHA-256: e1230f28cb49e1d41be04b5e8d63717dcd9af5c2e129b1a9fdf4d24b82a6a241
134 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of numerous external URIs, including one that appears to be a download link with a deceptive 'utm_term' parameter, combined with the 'SE_DOWNLOAD_BUTTON' heuristic, suggests a phishing or malware distribution attempt. The document body is heavily obfuscated and unreadable, but the heuristics point towards a lure for downloading a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://allytemp.ru/uplcv?utm_term=police+patrol+simulator+mod+apk PDF link annotation
    • http://trineckevzdelavani.cz/webpagebuilder/ckfinder/userfiles/files/48004674575.pdfIn PDF document text
    • https://begili.com/uploads/image/files/wijevazibasodidebu.pdfIn PDF document text
    • http://railwaysrailroads.com/upload_files/files/wunufu.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1613c546d450f1---2662744384.pdfIn PDF document text
    • http://760_709737661.mildmedia-dev.eu/uploads/userfiles/files/dubaxoxonebekafasufezow.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/tegizufirubemixelebibav.pdfIn PDF document text
    • https://www.hkfew.org.hk/ckfinder/userfiles/files/61140430211.pdfIn PDF document text
    • https://rosedreamholidayhomes.com/ckfinder/userfiles/files/50762930649.pdfIn PDF document text
    • http://full814.com/upload/files/96954986943.pdfIn PDF document text
    • https://agatanorek.com/files/file/pakazofot.pdfIn PDF document text
    • http://enjoybowlramenandpoke.com/uploads/files/69953597644.pdfIn PDF document text
    • http://dr-temt.ru/images/file/898790266.pdfIn PDF document text
    • http://epmresearch.org/userfiles/files/junuwarakef.pdfIn PDF document text
    • https://basisangka.com/contents/files/sifuxedopokedopawuno.pdfIn PDF document text
    • http://nemeckystrakac.sk/editor_uploads/files/gukok.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/54423842455.pdfIn PDF document text
    • http://moscowballet.ru/userfiles/file/42134347070.pdfIn PDF document text
    • http://sashtraayurveda.com/ckfinder/userfiles/files/42321448324.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1613a061623920---gupaf.pdfIn PDF document text
    • https://digicpictures.com/downloads/vizijamekegabonijuvuvutid.pdfIn PDF document text
    • http://leylatoprak.com/userfiles/file/53733325710.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_off0000d75e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD75E 17296 bytes
SHA-256: 5d4912b04f76ee3af0ca3ec9a348fae9265c67fd368f500bf24a0f9cf8fefb4a
font_01_sfnt_off00010467.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10467 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011c7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C7E 10764 bytes
SHA-256: 9cf40045f5cdb70a599d835b33f2881e531633d7673a456753e31af674a32faa

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