Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3873e82204e3fa5…

MALICIOUS

PDF

90.8 KB Created: 2021-05-18 17:53:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 10f0accb4b2b7db52419b4d04a69dbbd SHA-1: 5aeeae624958d3e346e0ca28428cdea99c134a25 SHA-256: f3873e82204e3fa53f42a501c514d20e05855de8664fa1f50afd37013f341e43
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9996

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://lozipotod.ru/strik?utm_term=how+to+drop+wyvern+egg PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4468259/normal_604d0aef4aa7b.pdfIn PDF document text
    • https://forexegazujolo.weebly.com/uploads/1/3/4/1/134108883/b635928.pdfIn PDF document text
    • http://fiselijuduguge.iblogger.org/c_s_d_full_form.pdfIn PDF document text
    • https://xuvevajepew.weebly.com/uploads/1/3/0/7/130739459/011b728.pdfIn PDF document text
    • http://givarixexav.iblogger.org/bloody_roar_3_ppsspp_iso_android.pdfIn PDF document text
    • https://gigexozokup.weebly.com/uploads/1/3/2/6/132695408/xiwepirojufopodusal.pdfIn PDF document text
    • https://sivusemekatew.weebly.com/uploads/1/3/4/4/134491367/logakunekanipatogebe.pdfIn PDF document text
    • http://pipawopozovifo.iblogger.org/peter_atkins_quimica_inorganica.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426675/normal_6069b53717fd3.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/bejikefowu/john_deere_garden_tractors_near_me.pdfIn PDF document text
    • https://s3.amazonaws.com/mogipegi/veruvixokoleburedok.pdfIn PDF document text
    • http://bunisanabasa.epizy.com/lotadipofizokibetunu.pdfIn PDF document text
    • https://s3.amazonaws.com/wozowuledij/bulleya_ringtone_song.pdfIn PDF document text
    • https://s3.amazonaws.com/sitok/manual_de_sobrevivncia_escolar_do_ned_assistir_online_dublado.pdfIn PDF document text
    • https://s3.amazonaws.com/xupovobejanam/fb_stock_earnings_report_date.pdfIn PDF document text
    • http://bosadubarelazu.rf.gd/how_to_call_forward_nortel_networks_phone.pdfIn PDF document text
    • http://mafofeguf.epizy.com/fugegimepujekimewumu.pdfIn PDF document text
    • https://s3.amazonaws.com/roxawo/angry_birds_star_wars_3_apk.pdfIn PDF document text
    • http://gogewarixisude.epizy.com/fifty_shades_of_gray_songs_list.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF51 4292 bytes
SHA-256: 7ebac4c43d98e21d8fdf0ae84b13d68e7ed08f81a91b7754738b6dfa7abdfdf4
font_01_sfnt_off00010e88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E88 4920 bytes
SHA-256: d15f4ac30ef7eab57331d164d70279586d37bfdfa333b8da6714ffda2a511695
font_02_sfnt_off00011f75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F75 12012 bytes
SHA-256: e12cca39f48c94b7e7167aa8bdf8ffa83c7416025c257664b9d3e4b1f9d8265c
font_03_sfnt_off00014857.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14857 16164 bytes
SHA-256: 3bea7abc0c32f2459a2699de513dece3f24c0870072ff980408ecea3f8bb078e

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