Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe66d52715232ab6…

MALICIOUS

PDF

75.5 KB Created: 2021-04-17 18:06:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: da9843ac925334291172e3c29959bf2a SHA-1: 8f112c88e8f6a82e0588c4e7f71eafdf18a70336 SHA-256: fe66d52715232ab691c18d3b9929be0119031e33aad19eb536134fde712babc6
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ponafet.ru/strik?utm_term=baby+fainting+goats+for+sale+nc PDF link annotation
    • http://cheatyou.site/hoja_de_vida_en_word_colombiaoah7s.pdfIn PDF document text
    • http://tuimag.ru/lg_truesteam_washer_error_code_le30lj0.pdfIn PDF document text
    • https://cdn.sqhk.co/kawurefeki/Zjhgie7/duviretazixaxodozaguse.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424040/normal_601991a54f7af.pdfIn PDF document text
    • http://kino-vezde.ru/jiwomibunosemoregami0c94i.pdfIn PDF document text
    • https://lajizifoposu.weebly.com/uploads/1/3/5/9/135958207/fb3d76.pdfIn PDF document text
    • https://gafalevomunu.weebly.com/uploads/1/3/4/2/134235362/1172921.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/5236298.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489975/normal_605d8ccf5342e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449411/normal_5ff11599dba32.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446152/normal_5fd0aad5ce1b5.pdfIn PDF document text
    • https://cdn.sqhk.co/giganopof/Qjfiajh/71462599620.pdfIn PDF document text
    • https://cdn.sqhk.co/pigexebobe/aGqoQOo/remote_desktop_connection_manager_windows_server_2012_download.pdfIn PDF document text
    • http://bhd-management.space/flight_simulator_3d_airplane_pilot_apk_downloaduyj5t.pdfIn PDF document text
    • https://vetasokimatajed.weebly.com/uploads/1/3/5/2/135296406/ponokiw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/956e8b7b-2c2a-4e90-9164-83eab97a3759/dijexezove.pdfIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/how_do_i_set_my_armitron_sport_watch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1f66810-5b2e-42fa-a8a1-b4723fd92a3a/holmes_ultrasonic_humidifier_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/bejikefowu/barclays_ppi_claim_letter_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31805198-fd15-4887-8a3d-91208dcf1b02/57040319693.pdfIn PDF document text
    • https://s3.amazonaws.com/tobojelusiwi/93642652956.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96fd5b86-c3ac-4e1a-92f5-84b086520938/netgear_wnr3500l_dd-wrt_firmware.pdfIn PDF document text
    • https://s3.amazonaws.com/padosumifubobo/80170460871.pdfIn 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d984.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD984 5128 bytes
SHA-256: 841400a01c8e85021fb8f516d5659fbc255b10f8e23adce8c6572b81a700623a
font_01_sfnt_off0000eb04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB04 11072 bytes
SHA-256: 01ec1f309c0c44f51177f72975f841c4851b458caf42cbc3fada8db2a7d8bf79
font_02_sfnt_off000110d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110D6 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378