Malicious PDF — malware analysis report

Static analysis result for SHA-256 730dae65756f7340…

MALICIOUS

PDF

80.8 KB Created: 2021-03-04 23:28:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2c65b5dace41acd5a750d2fa2f1763e0 SHA-1: e1ef58e05b2e4ee851f5ed3827ea3d8fedec4e65 SHA-256: 730dae65756f73401ad95459f2d9e94d01fc414b36a4db5dc36ae7343704cc40
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are to unknown or potentially malicious domains, suggesting a link farm or phishing attempt. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external links point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://soxebez.ru/aws?utm_term=how+to+reset+drum+on+brother+printer
    • http://sowopezamiw.medianewsonline.com/nopekomepodevekudoxavag.pdf
    • http://tixshopclub.space/93381022646q9fxy.pdf
    • http://jarevine.mywebcommunity.org/do_you_lose_more_weight_strength_training.pdf
    • https://zuxufigosod.weebly.com/uploads/1/3/4/3/134309968/gixexiwaludugori.pdf
    • http://barashik.space/jiminibuzawasimivukojikiw0u3.pdf
    • http://pixunune.sportsontheweb.net/81241714865.pdf
    • http://vumajuzatijerak.getenjoyment.net/what_is_project_management_professional.pdf
    • http://qiwi-wallet.online/71189525352l3kf9.pdf
    • http://gemubanabugawa.mypressonline.com/new_home_construction_pre_drywall_inspection_checklist.pdf
    • http://wapividazofar.scienceontheweb.net/graphic_novels_for_grade_3.pdf
    • https://zabojipenow.weebly.com/uploads/1/3/1/6/131636987/654e0.pdf
    • http://nicechange.space/rent_agreement_format_in_marathillsui.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/66bff8a8-53aa-4b53-9c72-5a2d0adcc9e1/selenium_webdriver_chrome_example_java.pdf
    • https://uploads.strikinglycdn.com/files/7417dade-73de-4937-911c-23b2b1feae12/20982142741.pdf
    • http://jokosen.atwebpages.com/mi_gente_translation_english_spanish_dictionary_reverso.pdf
    • https://uploads.strikinglycdn.com/files/9354d16b-542d-4bbd-9435-46f636bce4cd/forrest_fenn_treasure_found_june_6_2020.pdf
    • https://e114ad41-1367-46fe-a5fd-427bf640f69d.filesusr.com/ugd/a63c55_88342344daa0444991047d25f6667764.pdf?index=true
    • https://uploads.strikinglycdn.com/files/63477d86-1620-4e00-9e00-c9e1fbe7b0e3/sidimamaxu.pdf
    • https://uploads.strikinglycdn.com/files/7bf07d57-c1c5-46d9-9883-e6b90b38afbe/society_of_the_spectacle_chapter_4_summary.pdf
    • https://2a07c75e-e898-48ba-b326-4cccc82d0599.filesusr.com/ugd/ff154e_8c910db88eac481e89fa136f46e7530a.pdf?index=true
    • https://eb40363d-1d1f-4170-a897-f23f0f433116.filesusr.com/ugd/2a1429_f081ac3cef0b44ecb7d311ffb8e78395.pdf?index=true
    • https://63aa7d51-6c54-48cc-ac87-b710a0da19c3.filesusr.com/ugd/c8d394_ea9cb0e42ad849cdb9bfd6836d217b93.pdf?index=true
    • https://592908bf-dd96-48cc-88d9-ffebbdd10d84.filesusr.com/ugd/f34823_380163e9e51a47d99e81c1611e8cf81a.pdf?index=true
    • 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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010192.bin
f7dfdc3c539102b004bf789cf9713f50ef61b933a54ca48d2e888c67b6962c43		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10192 5152 bytes
font_01_sfnt_off000112f2.bin
927784f93aaa3a09453633447ecb44b24c1c0f658978737d12b0e1c20d8fa10b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x112F2 10196 bytes

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