Malicious PDF — malware analysis report

Static analysis result for SHA-256 efe0ceec7b0ed8c2…

MALICIOUS

PDF

99.1 KB Created: 2021-03-09 20:45:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 657035de4c94725c468c2d5eb7c136cf SHA-1: b6293f4696dcc4d04adb9d11c446b7cbf8f0953f SHA-256: efe0ceec7b0ed8c25dcfe6187df007d9bef2ac7e5a1fafe2d36253fe8e9e1d42
134 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the PDF is part of a link farm designed to host malicious content. The embedded URL 'https://fokemale.ru/strik?utm_term=what+is+a+running+record+observation' is a primary indicator of a potential phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://fokemale.ru/strik?utm_term=what+is+a+running+record+observation PDF link annotation
    • http://comforfemj.fun/salanopav9vtpp.pdfIn PDF document text
    • http://jumbochecker.com/1003087151619k05.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379605/normal_5fded7bf65c60.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445573/normal_6041b6aea5112.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448323/normal_6035523eca88e.pdfIn PDF document text
    • http://microdigitalmeter.xyz/teach_your_son_how_to_treat_a_woman_quotesnw66i.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368752/normal_5fe493e176cd0.pdfIn PDF document text
    • http://nukicew.xyz/vicks_humidifier_not_releasing_steam89nyc.pdfIn PDF document text
    • http://exampl1214.com/63057122821q7as4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367937/normal_601e7ec1abe30.pdfIn PDF document text
    • http://sallles.ru/how_to_adjust_bobbin_tension_on_singer_heavy_duty7yd2i.pdfIn PDF document text
    • http://kupelobivinix.22web.org/bhojpuri_video_song_2018_mp4.pdfIn PDF document text
    • http://pycnidwzxc.info/34985523007sy4c4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ebfb363-cb86-4f97-99cf-8772e376c6f3/harry_potter_and_the_sorcerers_stone_book_pages.pdfIn PDF document text
    • http://xuxerikafirin.epizy.com/jeep_grand_cherokee_srt_2018_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1c8955d-d8c0-4599-9dc5-067fb2140190/a_static_budget_is_best_used_to.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/589a3d98-fdc4-4a1e-9f01-251261e81b57/55933572728.pdfIn PDF document text
    • http://bamenawasez.epizy.com/51645116720.pdfIn PDF document text
    • http://ranajugupavogoj.rf.gd/biodiversity_and_conservation_notes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06bae0f0-cacb-4086-bd47-4473bb70b4ab/midnight_sun_book_trish_cook_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a7e3819-f9f7-4c82-a124-7fc49da13b84/when_the_terms_of_sale_are_fob_shipping_point_legal_title_to_the_goods.pdfIn PDF document text
    • http://pubupamosala.epizy.com/zufokilobaxejuleb.pdfIn PDF document text
    • http://zesaxuxi.rf.gd/ramiwasugikexivuvuw.pdfIn PDF document text
    • http://pejebitopaw.rf.gd/42669525181.pdfIn PDF document text
    • http://wifudozakiteg.epizy.com/75246357288.pdfIn PDF document text
    • http://lobidirubegevil.epizy.com/jelesavasapisabotalif.pdfIn PDF document text
    • http://rutozaduv.epizy.com/cant_get_pilot_to_light_on_gas_fireplace.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014578.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14578 5380 bytes
SHA-256: 17d2b4c89a42151050cc216a5b8752dde73dd4e422bd04180f8f7d22c90c3dca
font_01_sfnt_off000157cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x157CD 11340 bytes
SHA-256: 90df463673bb3a53e48e946d3b319805065b4fc298db7faca35118ce02a2ee08