Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d6efef3bc141cf1…

MALICIOUS

PDF

82.3 KB Created: 2021-03-17 09:51:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fa65eefda7ce93684773dad234360d33 SHA-1: e653b1f1f4233d9ee810d30cd5626d31857ec41f SHA-256: 9d6efef3bc141cf113ce3bb0f1a0ce9d05778de09da91aa7147bcc62a10e08f8
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a PDF link farm heuristic, suggesting an attempt to direct users to malicious or deceptive websites. The presence of URLs like 'https://soxebez.ru/wix?keyword=retro+lean+forskolin+shark+tank' and others indicates a potential phishing or malware distribution vector. ClamAV detection and ML classification further support its malicious nature.

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/wix?keyword=retro+lean+forskolin+shark+tank
    • http://lorozetuwivu.medianewsonline.com/hamilton_beach_flexbrew_keeps_saying_needle.pdf
    • http://jaxifas.getenjoyment.net/78146513305.pdf
    • https://jobadenel.weebly.com/uploads/1/3/1/1/131164033/fureke_mebikotage_rixeri_zazapolopegatun.pdf
    • http://sowoxapexemex.sportsontheweb.net/xosufuxujusewed.pdf
    • http://zexaribamemavi.sportsontheweb.net/xajakutabudivaki.pdf
    • https://fejigurize.weebly.com/uploads/1/3/4/5/134509658/b6a6878a0fea.pdf
    • https://tekevifumufov.weebly.com/uploads/1/3/0/7/130739519/jataxup_megeziw.pdf
    • http://ravigimojamel.mypressonline.com/best_agatha_christie_books_for_young_readers.pdf
    • http://zisuroto.mygamesonline.org/dell_precision_workstation_t3500_service_manual.pdf
    • http://finipupote.mywebcommunity.org/stewart_calculus_early_transcendentals_2nd_edition_answers.pdf
    • https://pabarasoziraw.weebly.com/uploads/1/3/5/3/135324669/f35706adf4.pdf
    • http://resokipuga.getenjoyment.net/aes_algorithm_tutorial.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://nubibubimalepik.atwebpages.com/cd4017_datasheet_download.pdf
    • https://uploads.strikinglycdn.com/files/2669961f-87b3-4bee-9b05-75e64d47d768/rikusiveko.pdf
    • https://300a1258-3b13-45f7-80b9-bd8966f45320.filesusr.com/ugd/81888a_bc4eb086e2b34b99ad494613034d9c93.pdf?index=true
    • https://92923600-264c-4cb8-9d87-181083d4f0d6.filesusr.com/ugd/0bf43f_b6068897c77b475d9933c6015471d14e.pdf?index=true
    • https://1138278f-e8d0-45ef-aef3-dbdd7428ac52.filesusr.com/ugd/5be868_af7ed2699219414ab97aaea0b94719c7.pdf?index=true
    • https://uploads.strikinglycdn.com/files/497d8c18-9b03-4680-98a3-ccd9e12d133c/itil_service_strategy_sample_exam_questions.pdf
    • https://14da0a27-f261-4d4b-8668-3a369f5c966d.filesusr.com/ugd/46429b_6fca497844104de0b202546f27fb9da0.pdf?index=true
    • https://uploads.strikinglycdn.com/files/4ebbcf9e-3df2-42d5-9b87-47d846537595/yamaha_rx-v373_receiver_review.pdf
    • https://uploads.strikinglycdn.com/files/6022cde9-fe11-4ac1-a6a5-2f2c2a4780be/44074075421.pdf
    • https://uploads.strikinglycdn.com/files/3a00dcb8-ba33-46d7-849b-ec879d84c3a6/maximum_ride_schools_out_forever_free_download.pdf
    • https://uploads.strikinglycdn.com/files/92eec616-7ecb-4afd-bed8-48af9a711cb0/verbos_en_ingles_y_espaol_con_pronunciacion.pdf
    • 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_off0001038f.bin
6fc1b48dca526a426499515e782fbc7c672987ac7469a71b9c006429882f9611		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1038F 4924 bytes
font_01_sfnt_off0001144c.bin
66dca94d56b0ebc6c052fa401bf706848afd9f0d179ec54ee51f4620d899091e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1144C 12136 bytes

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