Malicious PDF — malware analysis report

Static analysis result for SHA-256 552aef581a5cf350…

MALICIOUS

PDF

84.4 KB Created: 2021-04-08 07:19:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 0e3301960157e646e6a261807d26381f SHA-1: 19761ad057fb1325fe18abc677f8ae1130876d41 SHA-256: 552aef581a5cf350e19e2d4e87e1b927bd17ecf4c353745f6660d5a55dd3fe32
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 0.9992

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://xezojetit.ru/strik?utm_term=axe+fx+3+vs+2 PDF link annotation
    • http://rogevunesopu.medianewsonline.com/88430122205.pdfIn PDF document text
    • http://lakegefufen.scienceontheweb.net/aircraft_maintenance_manual_free_download.pdfIn PDF document text
    • http://fonujameritules.getenjoyment.net/cappadocian_fathers.pdfIn PDF document text
    • http://chaptejvxz.fun/66127592353jzdkn.pdfIn PDF document text
    • http://pekibimige.mygamesonline.org/45907822623.pdfIn PDF document text
    • http://leseweremizew.scienceontheweb.net/approach_to_classroom_management.pdfIn PDF document text
    • http://lugabev.mygamesonline.org/maths_sums_worksheets.pdfIn PDF document text
    • https://cdn.sqhk.co/jatobeguji/dicEggd/70316163158.pdfIn PDF document text
    • http://all-gopro.com/yuri_bezmenov_death40dqu.pdfIn PDF document text
    • http://viputixezererej.66ghz.com/christmas_carols_guitar_chords.pdfIn PDF document text
    • https://cdn.sqhk.co/lolajelor/egggdSw/jisokuwiwuzejuti.pdfIn PDF document text
    • http://labebatazavanoz.mygamesonline.org/the_art_of_travel_alain_de_botton_free.pdfIn PDF document text
    • https://cdn.sqhk.co/sepufaziru/gYgegec/bubble_bird_rescue_2_download.pdfIn PDF document text
    • http://lepawumu.22web.org/how_to_crochet_a_blanket_for_beginners_step_by_step_with_pictures_uk.pdfIn PDF document text
    • https://cdn.sqhk.co/badexejos/fjjNigd/electrical_electronics_symbols.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ramejepazino.rf.gd/lagu_salah_apa_aku_dangdut_metrolagu.pdfIn PDF document text
    • http://sutexuvidag.myartsonline.com/is_online_raffles_illegal_in_philippines.pdfIn PDF document text
    • http://kifavudufolafu.epizy.com/63017001083.pdfIn PDF document text
    • http://rabelame.atwebpages.com/bear_ears_template.pdfIn PDF document text
    • http://tumuxisirawev.rf.gd/fmla_guidelines_for_parents.pdfIn PDF document text
    • https://e691ad07-92dc-45fa-af10-8929b4045ede.filesusr.com/ugd/87b9a8_9bed3c6094a04fc49e59dc26c656b1eb.pdf?index=trueIn PDF document text
    • https://fa886832-b9e3-4ce5-a98c-97da2614721f.filesusr.com/ugd/9f8050_9c4e6fa4003b4449952cc0d5078ed3ab.pdf?index=trueIn PDF document text
    • https://bad3f395-1638-4667-b349-d6f934eeab49.filesusr.com/ugd/ed2d23_eafc8b4af4dc401fa4416eadff456b4b.pdf?index=trueIn 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_off00010c7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C7C 4836 bytes
SHA-256: 983a50e9154f34c61c26e35e3169a8db31f96d46d42834b28564d6f4ce2c0b7f
font_01_sfnt_off00011d1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D1E 11556 bytes
SHA-256: f404f096a092099b6a40e313fb6bb1c62e6fc7b1b37ed0993f13e98489002447

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