Malicious PDF — malware analysis report

Static analysis result for SHA-256 c20c520addc36b28…

MALICIOUS

PDF

81.6 KB Created: 2021-03-19 06:17:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 7683d27d35b81285fa37bcc56bb11cfa SHA-1: 964e9f47fd16007aee547e5f164d605df549ad29 SHA-256: c20c520addc36b280f8fd401c4191c075cf485070ddba7d74215c80d75def252
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 0.9964

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://resalured.ru/strik?utm_term=the+game+of+life+quarter+life+crisis+rules PDF link annotation
    • http://mobile-media.moscow/what_is_the_meaning_of_communication_skills_in_managementf877v.pdfIn PDF document text
    • http://help-verification.com/40k_kill_team_rulebookxzqau.pdfIn PDF document text
    • http://skout.tech/the_cat_in_the_hat_knows_a_lot_about_halloween_dvdbqdik.pdfIn PDF document text
    • http://opensalon.xyz/john_deere_425_54_inch_mower_deck_parts_diagramkhubu.pdfIn PDF document text
    • http://vannabanyavsedela.xyz/laser_tag_quest_near_meijywl.pdfIn PDF document text
    • http://luxuwum.mypressonline.com/8179689936.pdfIn PDF document text
    • http://technodom11.com/nuvalizofodanupxon.pdfIn PDF document text
    • http://bejisosubonito.sportsontheweb.net/biblia_de_estudio_reina_valera_1960_pc.pdfIn PDF document text
    • http://rezanufeku.mygamesonline.org/how_to_clean_cuisinart_chw-12.pdfIn PDF document text
    • https://cdn.sqhk.co/genizataxom/gdRgf8v/crash_of_cars_hidden_cars_desert.pdfIn PDF document text
    • http://lnstagramlivesupportcenter.com/odia_song_2018_video_hd_djwnlah.pdfIn PDF document text
    • http://community-day.ru/fishman_aura_reviewvwz9y.pdfIn PDF document text
    • http://faceit.su/potapuxo3f7wi.pdfIn PDF document text
    • https://cdn.sqhk.co/zuronenom/aliFTkX/militia_army_war.pdfIn PDF document text
    • http://roskycnmx.com/bonus_form_d_format_in_excelfazhl.pdfIn PDF document text
    • https://cdn.sqhk.co/mamozinuba/2Xhfhe4/foluniziture.pdfIn PDF document text
    • http://nigodofifulo.scienceontheweb.net/52086204523.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://3e1ae61b-6b68-46dc-8a90-d1c7a5b9f91c.filesusr.com/ugd/b8bbd7_acf46e86b08a47ccaa62fc9c4801ad8e.pdf?index=trueIn PDF document text
    • https://68f06c25-eb64-4e0a-94e3-a0e33e610147.filesusr.com/ugd/463ace_1740241c554941f1bd64243cbe541ce6.pdf?index=trueIn PDF document text
    • https://3ae4d138-4ba3-4962-98fb-1b98b40a6a82.filesusr.com/ugd/38062a_c1726c31a6454baab4eddc84b760d1d9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/votawawo/proform_hybrid_trainer_pro_elliptical.pdfIn PDF document text
    • https://d54d55f4-8004-4613-9f19-7b96cbed0ae7.filesusr.com/ugd/ce4b32_2d72894c610b43208c3a37f192db2d2d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/votubukaxogilix/basivexefevidezuvuvurezo.pdfIn PDF document text
    • https://s3.amazonaws.com/jexijer/54594311107.pdfIn PDF document text
    • https://s3.amazonaws.com/jikopot/10373291864.pdfIn PDF document text
    • https://s3.amazonaws.com/guvovigo/9467637491.pdfIn PDF document text
    • https://f7e05ffc-afae-4d19-be15-7e9c659e5e5f.filesusr.com/ugd/72f62b_5948e5f8140b4071b39b44409794b4ae.pdf?index=trueIn 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_off000101c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101C4 5372 bytes
SHA-256: a301de2b3c56e0f6649c94164b5814af34a03ed28777cb5958270fce1198afc5
font_01_sfnt_off000113de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113DE 10988 bytes
SHA-256: 4cfc77f2e3377a1f16fc0e48629a4b7d2d8bfe094bdda40e3d1a04fa0993450e