Malicious PDF — malware analysis report

Static analysis result for SHA-256 8165bd9db0f44ea2…

MALICIOUS

PDF

81.9 KB Created: 2021-08-04 00:22:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 49847e8e874c20a4c7de08bebd206eba SHA-1: f2916a3970807d292eb9c308af363bb63d93147f SHA-256: 8165bd9db0f44ea26d29a539486729e464bf885d05dd55887d548ed75ff41b40
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links pointing to compromised websites, suggesting a phishing or malware distribution campaign. The presence of external URIs and link farms on disposable hosting indicates an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://obermeyer-modemarkt.de/upload/file/16728664149.pdf In PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/ae3aa6e5b8d28b9369381e395fdb5930/93961202464.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160928b6eec0c3---13669335914.pdfIn PDF document text
    • http://naturallabs.de/userfiles/file/59614355340.pdfIn PDF document text
    • http://myxroad.com/upload/userfiles/file///64203977305.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/4f4c0228c84ccfbefcca0daa3aea8b71/dotominapoxaripe.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/16080c9af9c8ff---25738628432.pdfIn PDF document text
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/ea2613fe07ea24a1947d7a8cb59d9066/86912267900.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160db64a2d9ff9---guxesodojujakizotasog.pdfIn PDF document text
    • http://bycongroup.com/UserFiles/file/tutofajozudubusosomesigaj.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160abf6ccda1da---fivaworoxe.pdfIn PDF document text
    • http://zxsolar.com/d/files/karozinozojir.pdfIn PDF document text
    • https://wills.sg/wp-content/plugins/super-forms/uploads/php/files/aa278cd06eabd978f259c2e9901f14e2/runodavipakex.pdfIn PDF document text
    • https://aadhaarretail.com/administrator/imagetemp/file/losuxowagovex.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607a765f6e9a7---metarerimi.pdfIn PDF document text
    • http://bahattinburyan.com/userfiles/file/86931739903.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/bd4c201ef107dbfb573c914b71fdbb6a/lurasutuwaluwu.pdfIn PDF document text
    • http://englandmatchshirts.com/assets/file/66431618912.pdfIn PDF document text
    • http://thebranchoflife.org/clients/3/37/37a84c4c47f147f839b5d5a44bb1b86c/File/lunonobetixaloru.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a4c351975ff---18587772184.pdfIn PDF document text
    • http://timavoshipsupply.it/userfiles/file/dutobunabamaweze.pdfIn PDF document text
    • https://t2sc.me/userfiles/linonafazisu.pdfIn PDF document text
    • https://tipresentoio.it/images/file/88303813226.pdfIn PDF document text
    • https://mollis.rs//files/sunomifomab.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=masha+and+the+bear+russian+songPDF 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_off0000d0e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0E1 22704 bytes
SHA-256: 82a0b150488e09221727018c72d58fa1e535dbd5357a096888a6798043fd65cd
font_01_sfnt_off0001095b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1095B 10716 bytes
SHA-256: c57bbe27614e0626c82971a34510a9fa5033bfd52f30e025c328691dba43241e
font_02_sfnt_off000121a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121A8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1