Malicious PDF — malware analysis report

Static analysis result for SHA-256 960afb149616e533…

MALICIOUS

PDF

78.3 KB Created: 2021-03-14 03:37:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 513712d69005101568016af817a1d4bf SHA-1: 9ed7bfbadb4f1beb8903239789e82d7cac5dbb2a SHA-256: 960afb149616e5335fd5dd8977083916aa00ff9a9fe79efb3b9fd0d2dd4f2138
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9998

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 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://dafemum.ru/wix?keyword=trials+frontier+apk+mod+android+1+com PDF link annotation
    • http://lagutobokoza.22web.org/antenna_and_wave_propagation_notes_free_download.pdfIn PDF document text
    • http://fatadakar.iblogger.org/37597320272.pdfIn PDF document text
    • https://cdn.sqhk.co/kazamepa/njXghIj/91659062354.pdfIn PDF document text
    • https://cdn.sqhk.co/xiladuxe/OMhgZ9n/precise_v7_premium_rolling_ball_pen.pdfIn PDF document text
    • https://cdn.sqhk.co/lakisitu/EjaXegd/worst_video_game_ever_et.pdfIn PDF document text
    • http://zozavelomidabi.scienceontheweb.net/logitech_keyboard_k120_for_business_-_emea_-_russian_layout.pdfIn PDF document text
    • https://cdn.sqhk.co/bagudivibi/ghcMyja/68443520342.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/54e8ac4e-caae-4e4c-b85a-fce8f96b2a3b/insinkerator_repair_tool.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aef74084-f74a-421a-a1b9-650349b24c5a/xamexibamapopafadamuma.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b45459a0-ae3c-44c3-a783-7bd21784f3fb/what_is_the_focus_of_the_contemporary_psychoanalytic_perspective.pdfIn PDF document text
    • http://wedagavuvux.epizy.com/84706792394.pdfIn PDF document text
    • http://posawad.epizy.com/how_to_use_cuisinart_2_qt_ice_cream_maker.pdfIn PDF document text
    • http://rebipilu.epizy.com/what_does_carriage_return_mean_in_python.pdfIn PDF document text
    • http://sefudupufojuxo.rf.gd/2004_mini_cooper_service_manual.pdfIn PDF document text
    • http://disetorabagubed.epizy.com/cytogenetics_report_for_g-_banded_karyotype.pdfIn PDF document text
    • http://xosatog.epizy.com/nosajutudurifisowotutagi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e73e788c-0564-4b40-8c59-728eacedd073/tesov.pdfIn PDF document text
    • http://zixupav.rf.gd/10_personajes_historicos_de_mexico_y_que_hicieron.pdfIn PDF document text
    • http://zilowovuv.atwebpages.com/atheist_books_in_urdu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d03c402-0607-483c-9036-889f5e22942d/all_66_books_of_the_bible_in_alphabetical_order.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_off0000e26b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE26B 5364 bytes
SHA-256: 559e6160dd7df7a3800a2b359e151851cd49f19d72f5dc4fd08bb2a3b3f73a9b
font_01_sfnt_off0000f49c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF49C 17232 bytes
SHA-256: 145520c7daafe748d45e9abe0107e430d14e565191ace9c69610cb54ac3fb744

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