Malicious PDF — malware analysis report

Static analysis result for SHA-256 63003ec6cd0cb240…

MALICIOUS

PDF

83.4 KB Created: 2021-08-10 05:44:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: bd56e87356f15ad0c994c1c5f1111868 SHA-1: bc244b37531706e5c21a0c00c50f74ae074d9b9b SHA-256: 63003ec6cd0cb2400303df667ab217b5cf18c4e95f4a7d13a465d99291819296
164 Risk Score

Malware Insights

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

The PDF file contains multiple links pointing to compromised websites and a fake download button lure, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to trick users into downloading a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://smithmaloney.com/clients/3/32/32eae1a42220421eddab78da2f55685d/File/fakupamixivim.pdf In PDF document text
    • https://securitydm.com/slicice/file/mupamarizufejazor.pdfIn PDF document text
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a2a17be28e---89173616977.pdfIn PDF document text
    • https://drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160930607980e3---76127019002.pdfIn PDF document text
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/160a6af96ea4b4---dudavot.pdfIn PDF document text
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/5afe35217e7afc9f0c528d940d7ff088/xukofuninilojedilura.pdfIn PDF document text
    • http://s2ipower.com/survey/userfiles/files/59707882347.pdfIn PDF document text
    • http://auto-spec.ca/fck/file/zitidufujukowixase.pdfIn PDF document text
    • http://www.rannatennis.ee/data/upfiles/files/visigadadoxipip.pdfIn PDF document text
    • http://pension-erlkoenig.de/img/editor/file/13492626077.pdfIn PDF document text
    • https://www.tristar-technology.com/ckfinder/userfiles/files/lasisavojun.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083e37ca01d7---fubilonatujegominure.pdfIn PDF document text
    • http://pointerboards.com/uploads/admin/files/mavarumivinatenolabilaxi.pdfIn PDF document text
    • http://fusen-es.info/yamituki-n/uploads/files/13150567862.pdfIn PDF document text
    • http://www.dawnrotaryclub.tw/UserFiles/files/dozusetadufimeputizuwos.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/9a3ddc8302189ee41be4566f1c76704a/vomuvukuzagurofidibuzew.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2eb7969b31---nuxumezugon.pdfIn PDF document text
    • http://nature-revive.org/files/file/rerakofavinagoverigozura.pdfIn PDF document text
    • https://remoteworkerclub.com/wp-content/plugins/super-forms/uploads/php/files/7fd02ca0d1bf24e2861f57a133f92a7f/88310455434.pdfIn PDF document text
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/1433b6c3ebd2fc65c17844f0e711e5f2/88833972146.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/16077830a9904e---26030821575.pdfIn PDF document text
    • http://marthomaiticherukole.com/userfiles/file/bagabalemajido.pdfIn PDF document text
    • https://liffeyartefacts.com/fckimagefile/file/29412493944.pdfIn PDF document text
    • http://solamsys.com/userData/board/file/64337064098.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=omsi+2+free+download+megaPDF 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_off0000de29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE29 18184 bytes
SHA-256: 032cfb162403f67ec6955c4a0914816d88e876539ec4a2d0dc74debf5f0d1da2
font_01_sfnt_off00010d75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D75 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001258c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1258C 10828 bytes
SHA-256: ad802d5351e7840cf926f65ffae442fbc086aac8a873cc8df6f44836dee94961