Malicious PDF — malware analysis report

Static analysis result for SHA-256 28026e35350e8a68…

MALICIOUS

PDF

81.8 KB Created: 2021-03-14 21:43:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e58cb0fa94316d2c207e3091c7abe944 SHA-1: 3bfd8dea6557b26f6d9ece3b47f8e09fb4211509 SHA-256: 28026e35350e8a68f26b72bfdba290675717f81fc835cba02dd313e9d3a2ba8e
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating it is likely a phishing or trojan distribution attempt. The heuristic 'SE_BROWSER_INSTALL_LURE' suggests the document's content is designed to trick users into installing malicious software by posing as a necessary browser update or extension. The embedded URL 'https://xezojetit.ru/123?utm_term=cyber+hunter+hack+version' is a primary indicator of a malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • 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
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://xezojetit.ru/123?utm_term=cyber+hunter+hack+version
    • http://felejus.iblogger.org/billingsley_creek_fishing_report.pdf
    • http://sinisegezududas.iblogger.org/91856979173.pdf
    • https://zalekekowijix.weebly.com/uploads/1/3/5/3/135346798/liriserifabegubiga.pdf
    • https://wurixexaf.weebly.com/uploads/1/3/4/8/134865586/6c3efaf1e5edf.pdf
    • https://fapojenulexo.weebly.com/uploads/1/3/1/3/131383319/9254153.pdf
    • https://wudumimimi.weebly.com/uploads/1/3/4/3/134356267/02f22eeee3bd7.pdf
    • https://kajugomurabamuj.weebly.com/uploads/1/3/0/8/130814292/donuguvi.pdf
    • https://teniroge.weebly.com/uploads/1/3/4/6/134693228/tilafanipogarif.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/4819f17f-6485-42c7-ae8a-00ec9e26fb8e/2243164975.pdf
    • https://s3.amazonaws.com/janodojivi/92085225658.pdf
    • https://uploads.strikinglycdn.com/files/3ff58df7-80af-4f53-b49f-fd6739c6d7a0/equivalencias_de_unidades_de_energia.pdf
    • https://s3.amazonaws.com/tinajabizoreguf/mirae_asset_mutual_fund_stp_form.pdf
    • https://uploads.strikinglycdn.com/files/7548de55-755d-4841-83e5-7f4461701fbe/7804630262.pdf
    • https://uploads.strikinglycdn.com/files/b9a7f5b7-3d4b-494d-b5f6-345d4f43dd9e/89724602678.pdf
    • https://uploads.strikinglycdn.com/files/19a9588f-9bac-487a-b2e6-330d5c1716fd/how_to_replace_wireless_mouse_usb.pdf
    • https://uploads.strikinglycdn.com/files/316a893b-0272-4652-ab59-28904da8988a/faseza.pdf
    • https://s3.amazonaws.com/sepawi/1321868844.pdf
    • https://uploads.strikinglycdn.com/files/262e993d-093c-4544-aa68-d64a30a6caf3/79689434868.pdf
    • https://s3.amazonaws.com/dadupawo/lupekofoz.pdf
    • http://fuwujovul.epizy.com/how_much_hp_does_a_gsxr_750.pdf
    • http://juromozupipoju.rf.gd/how_to_setup_netflix_on_my_sony_blu_ray_player.pdf
    • http://numozuxoputani.rf.gd/does_my_ac_have_a_dehumidifier.pdf
    • https://uploads.strikinglycdn.com/files/9209f806-6050-42a6-98b5-cce0f1eb1c1a/buvokijef.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_off0000fa8e.bin
8a8b9219723a31ce9e7ac5be87e1ff593d9bedb2cd48b7220b59d9b42b0bf7af		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA8E 5128 bytes
font_01_sfnt_off00010bfd.bin
7fb1413ec6a887135ceb8521eafbd1006439ebf3f79d25e529034703a4691644		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10BFD 18392 bytes

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