Malicious PDF — malware analysis report

Static analysis result for SHA-256 acb12d5cee272d84…

MALICIOUS

PDF

129.2 KB Created: 2021-06-11 03:32:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 953196488037e2ba9d59b963407af4ee SHA-1: f9ad31aabfe9fd60d04d5fdff4f4f14376013902 SHA-256: acb12d5cee272d848a79fd43b33278d37451613b78b74b13baef876ee251bbfb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links pointing to compromised WordPress sites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of an attempt to redirect users to malicious content, likely leveraging a client-side exploit or a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://crysiq.ru/uplcv?utm_term=chandramukhi+tamil+full+movie+online PDF link annotation
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092a211910f9---biseduwuvejipibiraxu.pdfIn PDF document text
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/f5032d8d8065f27eba069f46de57dd52/wefovilinadawejumovitigal.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d2928dfd16---9516386846.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7d7860a68f---lebegusul.pdfIn PDF document text
    • https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b3eae438866---51085659443.pdfIn PDF document text
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/fd80a14573f909f3836fbee17d6e07bb/21495165039.pdfIn PDF document text
    • http://sjar-tech.com/uploadfile/file/%5C/2021051622490734.pdfIn PDF document text
    • https://apsco.ly/userfiles/files/rimumofesoligujatabokobud.pdfIn PDF document text
    • https://www.surajinformatics.com/wp-content/plugins/super-forms/uploads/php/files/024478ba889780f13ae5d96df7a38a27/60461240372.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/7475b538b80c9937561e1e190d8a59eb/gexivufegilezunitumibu.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/3cd49861302eb411de042e19367638d9/18671899481.pdfIn PDF document text
    • http://megat.pl/uploaded/fck_files/file/zepumajukixorupoz.pdfIn PDF document text
    • https://airflow-skateboards.com/upload/file/gesitepuboteses.pdfIn PDF document text
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/3sheu5rlqg6bmr5i29ua0shutv/kusolixebuvubumiluvofu.pdfIn PDF document text
    • http://nhhs78.org/clients/63854/File/20549043907.pdfIn PDF document text
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/jb2cvhei82gtl1jmhue5aamdjv/45839743905.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085204d0030c---wobotopedadorexexijuw.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/ag263gfl3727vaum27fp3m6q2d/gimebekudojikikokuwamowid.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn 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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00018272.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18272 5000 bytes
SHA-256: 5c6476d8379e2f07265acad28765a093e4a7380c6ade471b1481aa93485252c2
font_01_sfnt_off00019344.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19344 5468 bytes
SHA-256: be28b162e2dc9daadb4b1bf05c83c4911c5c005646884defc82e0a430ae163e5
font_02_sfnt_off0001a42f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A42F 2732 bytes
SHA-256: e9c6eb2d6520b24d5284464966c6d9f3267ee48aa25ac802942f3ad03022e6ce
font_03_sfnt_off0001b033.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B033 13412 bytes
SHA-256: 32c6e86591e0177a2fb14a399e7d8c35c1a69c955cb6816bcd9219d03e660ba2
font_04_sfnt_off0001dad0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DAD0 17248 bytes
SHA-256: 07b596e8ee6f7806f4a6500fee32d93e4fbfd2509edcd0e3673c444981fa04c4

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