Malicious PDF — malware analysis report

Static analysis result for SHA-256 46ffd01a49189c9c…

MALICIOUS

PDF

78.2 KB Created: 2021-06-06 05:07:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 600cf9de9265e63de15bfda53490d006 SHA-1: 2c14d8cfb19e5c749a362429ce89e24f0deec745 SHA-256: 46ffd01a49189c9c640960b437c76e8eeecbf4d0cb8ba1cc3ebeb8f9c56ec502
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 0.9997

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://crophysi.ru/123?utm_term=combined+financial+statements+audit+report PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4370547/normal_5feea6990fbfc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450242/normal_6037aec923029.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466146/normal_5fe2373f48118.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373508/normal_6005ecdf2871b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502188/normal_602ba877d3a37.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://pevozowo.pbworks.com/w/file/fetch/144423927/fce_for_schools_practice_tests_2019.pdfIn PDF document text
    • http://siwuromo.pbworks.com/f/where_do_i_report_1099-oid_box_1.pdfIn PDF document text
    • http://zezupagijene.pbworks.com/w/file/fetch/144691599/syllabus_of_bsc_computer_science.pdfIn PDF document text
    • http://kafunujazuwo.pbworks.com/w/file/fetch/144645471/juwekapowosefufemutevapij.pdfIn PDF document text
    • http://sulegiwi.pbworks.com/f/vatazofudakuloxevibubekop.pdfIn PDF document text
    • http://kusarolox.pbworks.com/w/file/fetch/144513936/sonekujumororibavuwije.pdfIn PDF document text
    • http://fosirodovo.pbworks.com/f/download_game_kick_the_buddy_forever_mod_apk.pdfIn PDF document text
    • http://lakebimutep.pbworks.com/w/file/fetch/144424347/37003883889.pdfIn PDF document text
    • http://jajisaparev.pbworks.com/w/file/fetch/144420771/22134004161.pdfIn PDF document text
    • http://mutoteja.pbworks.com/f/flight_pilot_simulator_3d_mod_apk_hack.pdfIn PDF document text
    • http://zupelapowi.pbworks.com/f/rimland_theory_example_ap_human_geography.pdfIn PDF document text
    • http://gabumur.pbworks.com/w/file/fetch/144593547/naruto_shippuden_all_opening_songs_mp4_download.pdfIn PDF document text
    • http://barumena.pbworks.com/w/file/fetch/144461364/67297448375.pdfIn PDF document text
    • http://xojipoxar.pbworks.com/f/cuantos_son_los_libros_de_la_biblia.pdfIn PDF document text
    • http://najapenoz.pbworks.com/w/file/fetch/144576798/phonics_worksheets_for_kindergarten_printable_free.pdfIn PDF document text
    • http://pilujibos.pbworks.com/w/file/fetch/144621150/ximufumakajekofiwigi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e79c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE79C 5344 bytes
SHA-256: ec16d3def5ccbb6a7a9444a9fe9d9bfcc48dcd7860764f17a5e46691888f217a
font_01_sfnt_off0000f9aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9AA 10392 bytes
SHA-256: 752471ea6f89102313f1035595bdd2d5100708bb2c9d0b965fe7566e9e92e279
font_02_sfnt_off00011cfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CFC 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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