Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cfc8daedb84307e…

MALICIOUS

PDF

90.5 KB Created: 2021-08-14 07:07:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: c5ef8a51528ffb776a745ba082d0af64 SHA-1: 165910e2fc08e2b644e41ea8bd65f3e164c74299 SHA-256: 2cfc8daedb84307ee39ed209f14ac76211a46adb07da1ef4997cb88a64938a16
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

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

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://drafthe.ru/uplcv?utm_term=jcb+3cx+backhoe+loader+user+manual PDF link annotation
    • http://thomasbelldescendants.com/clients/40432/File/bikanepoguson.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609865a05b2da---towasi.pdfIn PDF document text
    • http://hncastlecable.com/d/files/8143521337.pdfIn PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/bu0ar9igmfiiehcu98ghpchr0h/gavixufitu.pdfIn PDF document text
    • http://www.gleason.com.au/application/third_party/ckfinder/userfiles/files/51486021581.pdfIn PDF document text
    • http://oticonshop.net/ckfinder/userfiles/files/rinotur.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/0969d7e68048f12b8c1900b03c7787de/wulivexukos.pdfIn PDF document text
    • http://southwest66reunion.com/clients/f/f6/f6f8b7bd17d60304c359e527a2c43449/File/zerupebafodajegew.pdfIn PDF document text
    • http://dharmapremipariwar.org/userfiles/file/41146032029.pdfIn PDF document text
    • http://balogmihaly.hu/UserFiles/file/20146828992.pdfIn PDF document text
    • http://greenbrier101.com/userimages/kawikoxulibopigu.pdfIn PDF document text
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d0d2118226---40519282394.pdfIn PDF document text
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/ba80f4a8241a723a9705a0362feacdc8/lezus.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/02cdc630536963f51fd89a0e214312a9/87638413834.pdfIn PDF document text
    • http://fiumaradelsossio.it/userfiles/files/58083954664.pdfIn PDF document text
    • http://thongthien.vn/upload/files/nupinepugoxejutubas.pdfIn PDF document text
    • https://hanurichurch.org/ckfinder/userfiles/files/27313208659.pdfIn PDF document text
    • http://backkwang.com/userData/board/file/77611900991.pdfIn PDF document text
    • https://wineart.online/userfiles/file/97145785674.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc3dd19f1fc---pominapafugi.pdfIn PDF document text
    • http://montgomery71.com/clients/34132/File/tijekezedavaxepatuloguvet.pdfIn PDF document text
    • http://byecook.com/ckupload/files/wedatelubuwutulu.pdfIn PDF document text
    • http://sendedianqi.com/upload_fck/file/2021-7-19/20210719034909704653.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/evsboeeqmh8c8t3bo61b2kej6r/78164601584.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_off0000fd8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD8A 17080 bytes
SHA-256: 52de91c3aaf8f538036e91a653898bacb7d14236a764dcda31bdaa2bf1287732
font_01_sfnt_off00012a41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A41 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014258.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14258 11040 bytes
SHA-256: e3f4335e16a5e8254757b1aa408ad040713941c2ce1107818836cb1aba23d973

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