Malicious PDF — malware analysis report

Static analysis result for SHA-256 62d1e0cc8313ee16…

MALICIOUS

PDF

89.7 KB Created: 2021-07-01 00:31:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e10a6993d8876c2303b6d42c96a7f04d SHA-1: 9fc1c0ac54096ed7460f75c436c2735d66fd9f26 SHA-256: 62d1e0cc8313ee1674e4b62d25407db808d0cc441e15863882824b1483e512f9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics indicate the PDF acts as a link farm, directing users to multiple compromised WordPress upload storage locations and disposable hosting sites. While no scripts were explicitly extracted, the PDF structure and the nature of the URLs suggest it is designed to redirect users to malicious content, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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 http://aep-tc.com/cache/fck_files/file/veborawuxuwupegenu.pdf
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/e27cd7536b560234cc6d157b9c027a30/zaziv.pdf
    • http://ferramentabelleggia.it/public/file/pexemi.pdf
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dbfa7bdab3e---polinavabuzodetafojit.pdf
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bd96f3dfa0a---vukojomumeneg.pdf
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16085bd8819603---41096625219.pdf
    • https://fo-prefectures.com/pages/files/wavapufifowaf.pdf
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/abb142f17daec87f843aeb93f4468ddd/98346081459.pdf
    • https://elpmarketing.ca/wp-content/plugins/super-forms/uploads/php/files/3741c702f57e20c60d2b4fff8f504aa7/47901521.pdf
    • http://americandeliorder.com/uploads/files/gevidijinu.pdf
    • http://15889163.com/ckupload/files/25295241137.pdf
    • http://remproekt-m.ru/admin/ckfinder/userfiles/files/11448354331.pdf
    • http://altaprecision.com/userfiles/file/35608394684.pdf
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/087cec72d7b11ccce0a2b1d86d1d95d3/26794729152.pdf
    • http://xn--xhq021fvrwdth.com/d/files/fewosomo.pdf
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160808be36c7ad---70941880488.pdf
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609f3b4ea2df3---13149360827.pdf
    • https://bellevuecommunityfoodbank.org/wp-content/plugins/super-forms/uploads/php/files/06f6403ae11b722af997818386c0da5d/18282071813.pdf
    • http://e-pisanie-prac.pl/famprojekt_z_serwera/images/file/pinozaj.pdf
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/pitobejibotejiw.pdf
    • http://a-mega.ua/images/uploads/file/zikaxa.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=with+you+both
    • 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_off0000fc0b.bin
67b55bc41b775ab56bd1b404068f7fc5a8eec672c72021f275eedc2b7e063e2f
pdf-font-stream PDF embedded font (sfnt) at offset 0xFC0B 9840 bytes
font_01_sfnt_off000111ce.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x111CE 16792 bytes
font_02_sfnt_off000129e0.bin
55b7959a51e2576e5d8feafbb9bd29fff84b10b9611ebb13a119a27e01a86ca0
pdf-font-stream PDF embedded font (sfnt) at offset 0x129E0 18204 bytes