Malicious PDF — malware analysis report

Static analysis result for SHA-256 60fb3354ee0439fe…

MALICIOUS

PDF

96.8 KB Created: 2021-04-21 05:03:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: b9055c792c4fdb0a9f1b663e41c297fe SHA-1: 50beb76e989b0885f30f976afc30764bb8f7ae49 SHA-256: 60fb3354ee0439fe91e8cd2a2214eb6e798f042b6cab8fb73d01414dc6fda0eb
156 Risk Score

Malware Insights

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

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 0.9998

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 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.
  • 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://xajibur.ru/strik?utm_term=delta+universal+miter+saw+planer+stand+manual PDF link annotation
    • http://aycotoro7.xyz/slow_motion_video_maker_pro_apk2c728.pdfIn PDF document text
    • http://sutiboju.sportsontheweb.net/zoxelosan.pdfIn PDF document text
    • http://moymagazin.xyz/washington_football_team_name_redditn5dr9.pdfIn PDF document text
    • http://nakanilo.club/tecnicas_de_recoleccion_de_datos_estudio_de_casos2e79y.pdfIn PDF document text
    • http://sozimaxetupow.mywebcommunity.org/paul_bunnell_test.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jedaxopopuko/cambium_epmp_3000_datasheet.pdfIn PDF document text
    • https://b9eb3541-094c-4606-b101-17c2291fd6e1.filesusr.com/ugd/a18601_12818e6ba1ac4173ad374cfdfea1e7bf.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/widiku/blockman_multiplayer_for_minecraft_hack_apk.pdfIn PDF document text
    • http://pedamodaw.onlinewebshop.net/the_game_is_life_book_1.pdfIn PDF document text
    • https://s3.amazonaws.com/xedewofuretujo/c_excel_interop_format_cell_as_text.pdfIn PDF document text
    • https://s3.amazonaws.com/wupixufekijax/alien_vs_predator_capcom_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jidosatikim/piporivewuwuvap.pdfIn PDF document text
    • https://s3.amazonaws.com/zidosozawok/vosadebesitafufugulige.pdfIn PDF document text
    • https://s3.amazonaws.com/nevovumowa/sipowelegevumokifewuboz.pdfIn PDF document text
    • https://cf176ec6-4820-456b-adf9-61e5f06c968f.filesusr.com/ugd/43d598_a5d67612a4384a5ca6a22ef0af89aa53.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/legesiliv/54789072582.pdfIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/lazemotufetakum.pdfIn PDF document text
    • https://s3.amazonaws.com/xedewofuretujo/latitude_e7450_hard_drive_caddy.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_off0001368b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1368B 5256 bytes
SHA-256: 713afd25e24915e0622b3aec4f7af9114fffb1327ce6c7f2e37aa9e8d1f28c70
font_01_sfnt_off00014870.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14870 13148 bytes
SHA-256: 45549e054b604a99b7cff010dda6815e247cc30e7337d98cb05bfbc90017a72d

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