Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3f7170e41259201…

MALICIOUS

PDF

91.2 KB Created: 2021-08-08 08:41:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 94fed33f245c9c66e6c029b645b663b7 SHA-1: 174dec4e22865a07c765911cf979bbb2a8a96c89 SHA-256: a3f7170e41259201b9e3fd2ad718140558312e3d19289c5eef6c30684ffaaefd
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple compromised websites and disposable hosting domains, which is a common tactic for phishing or distributing further malware. The presence of numerous unknown URLs suggests an attempt to obscure the ultimate malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

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://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/12vvn2o0vft9eqslld5refkpne/71148942920.pdf
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af9f5952ae5---mabakito.pdf
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/bvnccivd1nv4g9bcsjunsdjoc0/26008657057.pdf
    • http://thegioixedap.net/upload/files/28816368598.pdf
    • http://thestarbusan.net/FileData/ckfinder/files/20210707_D65471493060A3C0.pdf
    • http://bephoangdung.vn/uploads/ckfinder/files/88468318770.pdf
    • http://xn--90afqerdlt1f.xn--p1ai/admin/ckfinder/userfiles/files/pefijogijuniwotexatu.pdf
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/7063cae77f3773bd0f2cbdc7d13af65a/92963998667.pdf
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7307b3ae0a---12785958689.pdf
    • http://danieldesignpro.com/userfiles/95756300669.pdf
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8b3af4e01f---32592535385.pdf
    • http://www.kymkarajok.net/tiedostot/files/51803951794.pdf
    • https://alperbehang.nl/userfiles/file/jevixepivepurapopituxe.pdf
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160879d64985be---12466293956.pdf
    • http://dycelife.com/userfiles/file/14188628235.pdf
    • http://casadiriposomarsala.it/userfiles/files/runedaji.pdf
    • https://mangonebike.com/uploads/file/witovokidobifeboguwokoj.pdf
    • http://nessium.net/userfiles/file/9264618267.pdf
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/160719a5ec01ef---xodawerabupu.pdf
    • http://genarchi.com/data/temp/file/vomafivosiriwerogokasi.pdf
    • https://hogies.com/includes/template/uploads/file/tufukamimezodelitidipa.pdf
    • https://aradovan.com/userfiles/file/selofeko.pdf
    • https://prolocolidodisavio.org/ckfinder/userfiles/files/lozozidinubaragemed.pdf
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098468f8892f---73604111578.pdf
    • https://luxm.pl/userfiles/file/83581336795.pdf
    • http://alpha-th.com/userfiles/file/kegekarewesajivetubefuwe.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=understanding+chemical+equations+worksheet+answers
    • 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_off0000fe70.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE70 16792 bytes
font_01_sfnt_off00011687.bin
c7469922d29c7c47cb9bda0374703de5262f71ab136b91db5b74aac4f5ff52c0
pdf-font-stream PDF embedded font (sfnt) at offset 0x11687 11248 bytes
font_02_sfnt_off0001303a.bin
865b7d855d944ca404fe99be8ce584d29542daa20c1a3886a6a5177d367f7728
pdf-font-stream PDF embedded font (sfnt) at offset 0x1303A 17012 bytes