Malicious PDF — malware analysis report

Static analysis result for SHA-256 070a32cfdf859131…

MALICIOUS

PDF

79.0 KB Created: 2021-09-19 20:33:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4c86f11f101230c8f52006f1aa6c9e64 SHA-1: 18bce7c1dd463f6a381f0b4c99d6201691efa057 SHA-256: 070a32cfdf859131a28fc0b1bf86f4c911aac70f7884aaf27b714c31e3638099
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with one pointing to a suspicious domain that is part of a link farm, suggesting a phishing or redirection scheme. The PDF structure and embedded content are consistent with attempts to disguise malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 http://anninh247.info/upload/files/fudoleliluxojimapapura.pdf
    • http://chip-chup.hu/upload/file/gijedopituwezezowat.pdf
    • http://feldbach-tourismus.at/files/32599846882.pdf
    • https://csam-villepinte.org/uploads/images/file/dofoku.pdf
    • http://goldway.jp/upload/board/file/73559881689.pdf
    • http://pbhdom.eu/userfiles/file/vejukujipowulidij.pdf
    • http://zae.me/datafiles/file/tuxumupajavozev.pdf
    • https://khotelmarket.com/FileData/ckfinder/files/20210916_CAD3B9C787CFA39C.pdf
    • http://sriagasthiyarastro.com/FCKeditor/userfiles/file/dijojevivovak.pdf
    • https://strefaokazji.pl/uploaded/file/vujoxafumizofowazavidem.pdf
    • https://www.syah.org/wp-content/plugins/super-forms/uploads/php/files/0871b4bf3f1021c36ee0045631a9bd4c/17616934044.pdf
    • http://angelojrobles.com/admin_initial_test/userfiles/file/81160474520.pdf
    • http://hakasasi.id/userfiles/file/duwefovixevajade.pdf
    • http://rungrawin-itt.com/userfiles/files/95397123656.pdf
    • http://express-service-auto.fr/ckeditor/ckfinder/userfiles/files/gozoloxukazasavoziker.pdf
    • https://pacie.vn/web/uploads/files/ruzugiwiwexus.pdf
    • http://kennycojewelry.com/userfiles/files/202109/1631861596.pdf
    • http://copingconversations.com/userfiles/file/74416332661.pdf
    • http://www.smartusb.info/images/library/File/24477435583.pdf
    • https://ecableapp.com/FCKeditor/FCKimgUpload/file/wewojusutaxatabawiz.pdf
    • https://saptabangunmanunggal.com/indomobils/upload/file/zojadinorekuxapadovop.pdf
    • http://www.anglometais.com.br/adm/Editor/ckfinder/userfiles/files/bufuwa.pdf
    • http://uitvaartverzorgingsindex.nl/images/uploads/jukaw.pdf
    • http://zhuxintrading.com/uploads/ckfinder/files/20210918/16319458102893.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=comptia+a%2B+220+901+and+220+902+pdf+free+download
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd11.bin
e9ac541afc093225c241d657d63f41c04173e5ac60778c075769273fe46a71d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCD11 11072 bytes
font_01_sfnt_off0000e6f2.bin
bc612de4dd940a60e632da891ec4c528110bd68abf7b2a8e293bd3b915a38897		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE6F2 18132 bytes
font_02_sfnt_off000115f6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x115F6 16792 bytes

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