Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2617e855c279964…

MALICIOUS

PDF

78.7 KB Created: 2021-03-20 19:50:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 18bb416ae67d9e7b65fad580dba57b4f SHA-1: 1d0afe147fde6522c1f99e1745723205f5b643ae SHA-256: e2617e855c279964e5b2d2428d7c7fbdff62f31100fe3026857574d0cf6735cc
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 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://zajinet.ru/wix?keyword=nissan+collision+repair+manual PDF link annotation
    • http://yandex-delivery.cc/painting_ideas_canvas_acrylic_easy88axj.pdfIn PDF document text
    • http://fabermanufacture.ru/sync_contacts_with_google_androidjt6hm.pdfIn PDF document text
    • http://fomuvegikutidob.iblogger.org/gikodag.pdfIn PDF document text
    • https://cdn.sqhk.co/jegamaxegev/jegche6/the_king_of_chess.pdfIn PDF document text
    • https://cdn.sqhk.co/xibetevoxaj/Kjhghji/stylish_fonts_premium_apk.pdfIn PDF document text
    • http://wowmarket.info/active_listening_2_student_s_bookqyob4.pdfIn PDF document text
    • http://nanonewe.scienceontheweb.net/how_to_repair_the_heating_element_on_a_dryer.pdfIn PDF document text
    • http://datulosuwila.iblogger.org/92206485319.pdfIn PDF document text
    • http://zuvewedapajazo.iblogger.org/it_inventory_template_xls.pdfIn PDF document text
    • https://cdn.sqhk.co/wimiwupo/jgfgfif/starcraft_1915_limited_ob.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xejobutek.onlinewebshop.net/guwosalemukulatotivijaf.pdfIn PDF document text
    • https://s3.amazonaws.com/gezizefefififa/how_to_cook_rib_on_the_grill.pdfIn PDF document text
    • https://d4f4546a-a836-4b3d-8651-c56b89608eca.filesusr.com/ugd/3e9e83_8ec6e5c7e6be46c9ad14ab11a0495e49.pdf?index=trueIn PDF document text
    • https://5e024257-ca51-40df-b6b5-a3104c7b7124.filesusr.com/ugd/97368a_eb7dd68a6f8442ce8229532628392ac4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wupiwupiwot/what_can_you_do_with_a_black_and_decker_workmate.pdfIn PDF document text
    • http://lawesiwewif.onlinewebshop.net/78147050110.pdfIn PDF document text
    • https://1fd079ea-3156-4ae8-a0b4-6153e0b529c5.filesusr.com/ugd/e66bf7_ad9418f3809d4d5e8daa289cfe053146.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dujepav/sociology_of_law_book.pdfIn PDF document text
    • http://nujunawefati.epizy.com/brute_force_password_online.pdfIn PDF document text
    • https://2703069b-a6ff-4ff9-983c-db139a8d76ba.filesusr.com/ugd/8b61cf_82793aa3a85144c481253464eb3a3156.pdf?index=trueIn PDF document text
    • http://kanusilos.epizy.com/mimimixeximaxigefuz.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_off0000f833.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF833 5048 bytes
SHA-256: 9e3be943161755309b85a46b35614174edef99d9667ed8234bae4814fe39d0aa
font_01_sfnt_off00010948.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10948 10604 bytes
SHA-256: aec835388f345d2bf6340c45113b428dad6e4f421089235007b7754c04c3ecf7

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