Malicious PDF — malware analysis report

Static analysis result for SHA-256 392a0b1e987e31da…

MALICIOUS

PDF

86.6 KB Created: 2021-09-12 20:04:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 6c15c2aff25ee0206db4e2271b423ec6 SHA-1: ee04c711ce2280a4bf029870d8e239970684a128 SHA-256: 392a0b1e987e31da76597ee9fc70c17e812531de2612ece291dfb3a8003b8199
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The sample was detected by ClamAV as Pdf.Phishing.Trojan and an ML classifier flagged it as malicious. It contains numerous embedded URLs pointing to external PDF files, indicating a link farm or redirection mechanism. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic suggests these links are intended to obscure the true destination, a common tactic in phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9944

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://manorhair.com/uploads/files/202109120843496126.pdf In PDF document text
    • http://smlstripedbass.com/home/rock/public_html/ckfinder/userfiles/files/60134911537.pdfIn PDF document text
    • http://opuspointpartners.com/ckfinder/userfiles/files/wixoxuzufowabulej.pdfIn PDF document text
    • http://eggtesting.com/admin/uploads/file/63980853643.pdfIn PDF document text
    • https://fasaac.org/temp/files/95404422165.pdfIn PDF document text
    • http://naszymsladem.pl/upload/file/sotexonipujapukujunerefo.pdfIn PDF document text
    • http://wych123.com/upload/files/ritutokubozivepo.pdfIn PDF document text
    • http://quangcaosmsgiare.com/media/ftp/file/78380616677.pdfIn PDF document text
    • http://simkoongschool.com/uploads/editer/files/75516148225.pdfIn PDF document text
    • http://classicalgardenstatues.com/uplds/file/xebivafokolepur.pdfIn PDF document text
    • https://magnettoptan.com/upload/ckfinder/files/ravukijogirumiberejaj.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/161399c0ea6585---66185028026.pdfIn PDF document text
    • http://litroshaber.net/resimler/files/11660026619.pdfIn PDF document text
    • http://www.halpellet.hu/userfiles/files/vuvofamulor.pdfIn PDF document text
    • https://www.habitat-morvan.fr/ckfinder/userfiles/files/nirajaponagagixejefinevov.pdfIn PDF document text
    • http://miraesusan.com/ckupload/files/52487471961.pdfIn PDF document text
    • https://portalbime.com/UploadedFiles/New/file/nuzadikolemegilim.pdfIn PDF document text
    • http://stellarvvv.ru/ckfinder/userfiles/files/wejusilusejegusisirufo.pdfIn PDF document text
    • http://computerdoki.hu/user/file/49649490235.pdfIn PDF document text
    • http://humidorio.de/ckfinder/userfiles/files/wixuwix.pdfIn PDF document text
    • http://campfirewtx.org/userfiles/file/25778703144.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a0f8ad05bc---wipeturabufutelabikulewim.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=prince+of+persia+the+two+thrones+free+download+for+pcPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c833.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC833 24656 bytes
SHA-256: ec191354c6f8d51775353fd4056283d8700152ca65d32305d2c0b68fe6091893
font_01_sfnt_off0001051f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1051F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011d36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D36 10804 bytes
SHA-256: 46619321fa716d4b163311732ca9ea204e929205d0bbe34f2c3ee9adbb25ad13
font_03_sfnt_off00013614.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13614 16252 bytes
SHA-256: 1b8db45e7ce78afa1a930e4adc7d2cc3d98092d808e7cdf3049bd86f2cb86cbf

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