Malicious PDF — malware analysis report

Static analysis result for SHA-256 c586ce8af31c1e48…

MALICIOUS

PDF

89.9 KB Created: 2021-03-23 20:48:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 42eac11d7fbb0e3185f46a9061b107a2 SHA-1: 86468c5ea6f3f389cce1c9d1dd72bfd35bdb7445 SHA-256: c586ce8af31c1e48ae6f6546b8633b01904da9b87afb8023ea0f0dd4ebbd31e4
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 0.9994

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://bologen.ru/strik?utm_term=ford+mustang+gt+2021+interior PDF link annotation
    • https://cdn.sqhk.co/budotedo/j6idoVj/post_office_days_off_2020.pdfIn PDF document text
    • http://getplafond.xyz/brag_sheet_template_sample7p7r3.pdfIn PDF document text
    • https://cdn.sqhk.co/sabepakofo/jcjiihs/best_gospel_songs_2020_mp3_download.pdfIn PDF document text
    • http://stikc.xyz/2001943038964sgc.pdfIn PDF document text
    • http://rmk4sale.xyz/2444795773469p77.pdfIn PDF document text
    • http://damalakin.22web.org/94185024413.pdfIn PDF document text
    • http://chatik85939775.fun/boxoxemuwedamadirapumsvdt.pdfIn PDF document text
    • http://thiswaytovogue.com/being_on_time_quotes_and_sayings0ub02.pdfIn PDF document text
    • http://medyayazilimtr.com/electric_guitar_parts_and_accessoriesrdtgt.pdfIn PDF document text
    • http://vakotuwudar.22web.org/buradalaguzit.pdfIn PDF document text
    • https://cdn.sqhk.co/kimorotadopo/iih2hdN/birthday_pictures_for_1_year_old_baby_girl.pdfIn PDF document text
    • http://adv-workshop.site/how_to_do_paper_butterfly_step_by_stepr4gjf.pdfIn PDF document text
    • https://cdn.sqhk.co/pesasotiro/8QjcVgd/cara_klaim_voucher_paket_game_telkomsel.pdfIn PDF document text
    • http://lnstagaram-verifiedbadges-from.com/woxusofokisoribujejyoj6u.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
    • https://s3.amazonaws.com/dosalapasenow/jexunomeroxuvunewe.pdfIn PDF document text
    • http://bolutiso.epizy.com/rigipezenugiwixa.pdfIn PDF document text
    • https://s3.amazonaws.com/firigugixujotov/81463066817.pdfIn PDF document text
    • http://jidodurej.epizy.com/final_fantasy_12_zodiac_trophy_guide.pdfIn PDF document text
    • http://pojasosi.epizy.com/hawke_cable_gland_accessories.pdfIn PDF document text
    • https://s3.amazonaws.com/dejazuvorira/spider_man_2_game_pc_softonic.pdfIn PDF document text
    • http://duvujod.rf.gd/mamogenesis_lactogenesis_y_galactopoyesis.pdfIn PDF document text
    • http://boripodadup.epizy.com/44783906148.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_off00011599.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11599 5276 bytes
SHA-256: 593a9fccefdcf42ca0a45eddb5a14882562540c537544f124b875ebf49169780
font_01_sfnt_off0001276e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1276E 10936 bytes
SHA-256: a675ec89c5ff40b2965e10a5dd303efe193af82f03406ca512caa3c1e9445772
font_02_sfnt_off00014c22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C22 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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