Malicious PDF — malware analysis report

Static analysis result for SHA-256 62984f9289e13877…

MALICIOUS

PDF

68.1 KB Created: 2021-02-28 12:13:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: dcdee80423a7f2ff5414a04ece67a884 SHA-1: 2158811f556e33c0f39d02accffdfa4f2dce19a6 SHA-256: 62984f9289e13877366835eb75853f53502cbf7090c70ab6275288e3b0c0de1c
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 0.9998

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://seumenha.ru/123?utm_term=slaves+to+darkness+start+collecting PDF link annotation
    • http://importants.space/7972323738jp6rr.pdfIn PDF document text
    • http://paselon.getenjoyment.net/64647762632.pdfIn PDF document text
    • http://idealica-itufficiale.website/391102569392geve.pdfIn PDF document text
    • http://kamikofonem.mygamesonline.org/how_to_install_adobe_flash_player_in_chrome_android.pdfIn PDF document text
    • http://lamakexo.scienceontheweb.net/baii_plus_financial_calculator.pdfIn PDF document text
    • http://ideaita.fun/473478141225i81p.pdfIn PDF document text
    • http://itanah.space/mr._dog_scary_story_of_son._horror_gamej254m.pdfIn PDF document text
    • http://loduwij.scienceontheweb.net/how_to_calculate_redox_titration.pdfIn PDF document text
    • http://prodson.space/what_is_a_calorie_deficit_and_how_does_it_workvfp1p.pdfIn PDF document text
    • http://vzruvayarttraff.xyz/984099013776lj3x.pdfIn PDF document text
    • http://larebalin.mypressonline.com/the_story_of_edgar_sawtelle_movie_cast.pdfIn PDF document text
    • https://cdn.sqhk.co/sisadenev/yjhicje/47725590247.pdfIn PDF document text
    • http://zizodoroluxonaf.sportsontheweb.net/is_156_a_good_quantitative_gre_score.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pabewuvuxaf.onlinewebshop.net/freestyle_shark_classic_watch_xl.pdfIn PDF document text
    • http://soranodabiwegi.myartsonline.com/how_to_win_friends_and_influence_quotes.pdfIn PDF document text
    • http://mukanebesiva.atwebpages.com/dimensions_of_mini_football_field_in_meters.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_off0000cda3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDA3 5332 bytes
SHA-256: ff674bf1d794d95ca12b62f2d5ce4d873d7ad2220465340afda5b5ebf847644b
font_01_sfnt_off0000dfdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFDB 10496 bytes
SHA-256: d1445eae294d54c0c5f66e224878c2fd3a03a7773f88b444911c42c7d66b2ae7