Malicious PDF — malware analysis report

Static analysis result for SHA-256 edeccb4ebdb87aa3…

MALICIOUS

PDF

70.7 KB Created: 2021-09-10 07:10:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-23
MD5: 0e0a6c373510246f78f7716c2d4a3998 SHA-1: 8b5cf5c86d1d449edf3944e85e6a8bb2a8bd5500 SHA-256: edeccb4ebdb87aa32de9118216e95046ecc9ce35a77c17dfe27ea7f8adc3cffc
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 5

  • 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.
  • 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://oniceh.ru/uplcv?utm_term=transfer+sms+from+iphone+to+android+without+computer PDF link annotation
    • http://rivebistro.net/ckfinder/userfiles/files/60386520047.pdfIn PDF document text
    • https://eastmanllc.com/ckfinder/userfiles/files/25349623252.pdfIn PDF document text
    • http://energy-labels.nl/userfiles/file/nutipeg.pdfIn PDF document text
    • http://bobmeetin.com/media/galleries/files/4709112696.pdfIn PDF document text
    • http://angelojrobles.com/admin_initial_test/userfiles/file/39590482717.pdfIn PDF document text
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/1612f179ccfdf6---fajiv.pdfIn PDF document text
    • http://whipitleather.com/userfiles/file/ligoxukatuben.pdfIn PDF document text
    • http://notar-frings.de/userfiles/file/vakoluso.pdfIn PDF document text
    • http://alfonsoguiggiarchitetto.it/userfiles/files/beronu.pdfIn PDF document text
    • http://bienchidan.org/uploads/files/55121886626.pdfIn PDF document text
    • https://webtechnocrats.com/upload/file/vovebejanupokomofe.pdfIn PDF document text
    • https://allianztc.ro/files/file/28508942520.pdfIn PDF document text
    • http://bishnutoursandtravels.in/userfiles/file/62854348400.pdfIn PDF document text
    • http://finadev-groupe.com/userfiles/file/34300942411.pdfIn PDF document text
    • http://cmtdental.com/upload/ckimg/files/bikosokipifikugukaleviwu.pdfIn PDF document text
    • https://faktxeber.ru/resimler/files/tederetanefukoretupibir.pdfIn PDF document text
    • https://e-fasteners.eu/media/file/wozogulaxelaj.pdfIn PDF document text
    • http://marisqueandopremios.com/campannas/file/vuzox.pdfIn PDF document text
    • http://joltiy.ru/uploads/files/67699882250.pdfIn PDF document text
    • http://tpt.taipei/asset/uploads/files/bifovokosutifo.pdfIn PDF document text
    • http://motty-etai-sharon.com/files/files/zosilut.pdfIn PDF document text
    • http://benthanhsgfarm.net/images/uploads/files/80434001514.pdfIn PDF document text
    • http://costanzolegal.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/26317388339.pdfIn PDF document text
    • https://hohsingfiber.com/ufiles/files/71565555539.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_off0000b2f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2F9 15956 bytes
SHA-256: 9c47567206056fc642f83b8ce32179a32a5d7994f1aa359f995301af91323658
font_01_sfnt_off0000db87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB87 10988 bytes
SHA-256: 2c5f3ea1dd4b5ddce554beac17533af8d8caf061f7dbd787aa8a1549c2a94afc
font_02_sfnt_off0000f4f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4F2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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