Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bcdac388b52d9f6…

MALICIOUS

PDF

75.4 KB Created: 2021-03-14 10:47:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 1879fae20da7372abb5ec8170403d28c SHA-1: b8c187dafb8cc91f7fb1a2c4b287525d9d14e437 SHA-256: 2bcdac388b52d9f62743ff352c5e81ac6e8b8d5ca96e281cf211fdb819029110
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 0.9989

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://xezojetit.ru/123?utm_term=checkerboard+slip+on+platform+vans PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4461509/normal_604d75c61dc91.pdfIn PDF document text
    • https://cdn.sqhk.co/sadirurafixi/PhhiaGR/37738084387.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410965/normal_6033a753407b6.pdfIn PDF document text
    • http://jekebes.iblogger.org/why_wont_my_garmin_gps_connect_to_my_computer.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366662/normal_5fd77281d748a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405639/normal_5ffe299aae501.pdfIn PDF document text
    • http://zezarujewida.iblogger.org/46541239785.pdfIn PDF document text
    • http://kavevisukedawox.22web.org/abu_garcia_silver_max_reel_parts.pdfIn PDF document text
    • https://cdn.sqhk.co/duvapegoleva/isliaVD/big_fish_eat_little_fish_proverb_meaning.pdfIn PDF document text
    • https://cdn.sqhk.co/jakovenuz/EKrhikl/acids_and_bases_class_11_notes.pdfIn PDF document text
    • http://bijivarudigodig.iblogger.org/healthy_indian_recipe_books.pdfIn PDF document text
    • https://cdn.sqhk.co/debefuki/qkbQhht/texas_longhorns_women_s_basketball_recruiting.pdfIn PDF document text
    • https://cdn.sqhk.co/resilano/b5hdYQy/59118691604.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/fopalew/tuvike.pdfIn PDF document text
    • http://xiramubete.rf.gd/dnd_5e_warlock_patron_great_old_one.pdfIn PDF document text
    • https://s3.amazonaws.com/libosokune/bootstrap_3_cards_template.pdfIn PDF document text
    • http://rirazito.epizy.com/what_is_inductive_approach_in_qualitative_research.pdfIn PDF document text
    • https://s3.amazonaws.com/kiremefegonar/vmware_workstation_12_keygen_free.pdfIn PDF document text
    • http://zibemusisuvimal.rf.gd/orbit_faucet_timer_leaking.pdfIn PDF document text
    • http://taluzeze.rf.gd/obtain_police_report_nashville_tn.pdfIn PDF document text
    • http://suguxamux.epizy.com/xedesosawumamon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8dc7ec51-d853-4e29-a818-30c6f64f2b0c/should_i_learn_android_development_in_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/wazagidonux/aventail_connect_tunnel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8062d687-14a5-4385-9eac-582115a69bd5/how_to_simplify_by_distributing_and_combining_like_terms.pdfIn PDF document text
    • https://s3.amazonaws.com/fadedosi/takirifatavijoseloragabi.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_off0000dba2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBA2 5468 bytes
SHA-256: 49cc191889c9ad76c868c92257fb81e98066c17d54535bad3fdd37e5863fd889
font_01_sfnt_off0000edfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDFE 10448 bytes
SHA-256: 8f64efe406b3b2561f03a8aa61c2bdede3ceaf5060f71c63507e915407c9daef
font_02_sfnt_off000111cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111CD 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f