Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebdc7e6fa21e231c…

MALICIOUS

PDF

115.3 KB Created: 2021-06-28 04:43:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c3b7143fe5eef507e37890b4cec06de7 SHA-1: 1c702dfcace9f26c51f39992510e3175a655f409 SHA-256: ebdc7e6fa21e231cd79fe384683a15384d593018b772ad08d3f0d100df00a82a
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to compromised WordPress upload storage, suggesting a lure to download a malicious file. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely provides instructions to open a password-protected archive, a common tactic to bypass gateway scanning. While no scripts were directly extracted, the PDF structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9885

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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 http://yao-cheng.com/uploadfiles/20210626074609.pdf
    • http://mobilesamara.com/img/files/file/wepumifimemal.pdf
    • https://anmoul.com/userfiles/file/18571272100.pdf
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160cc82b9b767a---44172105290.pdf
    • http://bestapp4u.com/admin/uploadedfiles/file/80113210734.pdf
    • http://bayanairag.com/uploads/userfiles/files/zotijuzi.pdf
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d2866b4c07---dobutijugumagazajomej.pdf
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/16073d6df257c2---46127912149.pdf
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607e84f3eae1f---60483646250.pdf
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/ea6b06314d07d1ffe584ef0d691d9361/betibasajanimipisiji.pdf
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/b9f262a550e31a285b5cb27092c4de31/luginile.pdf
    • https://orldoc.ch/wp-content/plugins/super-forms/uploads/php/files/ttolhv1qjfhg0gfgre01f562c7/79205191273.pdf
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/totv39qnsm4kivmfgefqhf5bu3/52298302234.pdf
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/8571cd3cb83ea3e45ca60f9e62bd52d3/lativorepufivisi.pdf
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c5eeec4ba02---vamozonakogelimuroz.pdf
    • http://phpirateboosters.com/clients/867602/File/26790434633.pdf
    • https://rebel-guitars.com/wp-content/plugins/super-forms/uploads/php/files/0965eb7b65a8956720e210b432715e65/36050219504.pdf
    • https://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/1607bd7dc532f0---metasixarelepalemofa.pdf
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/6047060905fdeca5f2fe81888a3961c1/12543358199.pdf
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/b2e501e8b6ea706d5ea2fe6829c17141/91486824394.pdf
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ad7ec97a8c3---57276930914.pdf
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/1609ed295a1d34---vuxoxawezivubofef.pdf
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160abee296a6ef---sonaluzuganubidodebukapit.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=pearl+harbor+full+movie+hd+1080p+english+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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000168fb.bin
ac30adb0318c81c772522847c378e6cd73ae0316e155d903d3ace924430da8b1		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x168FB 20580 bytes
font_00_sfnt_off000133fc.bin
eadd3cb6a173bb4b5ba911d39f86e2d52953df47be61cb182bc3ad2aea3db59d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x133FC 20532 bytes
font_02_sfnt_off00018bed.bin
2f7c868c11387be51eaf0f4b9014896f65ef59a5245bf9f805b9fe7dd1a27d49		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18BED 11624 bytes
font_03_sfnt_off0001a703.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A703 16792 bytes

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