Malicious PDF — malware analysis report

Static analysis result for SHA-256 f29dfbd6ad5b2241…

MALICIOUS

PDF

80.4 KB Created: 2021-05-08 21:07:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 2b5808a0224f7fec351071e43e15c052 SHA-1: d72b548ccc853c005ada19a932a9dccae85766bb SHA-256: f29dfbd6ad5b22418beefa6905252b6645ae0d246a58c942c0e92fb3499fca9c
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 0.9995

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://crophysi.ru/strik?utm_term=how+to+find+average+book+value PDF link annotation
    • http://feremujidonigu.getenjoyment.net/58585551457.pdfIn PDF document text
    • https://cdn.sqhk.co/jusitufugaf/ihhbkid/glory_of_generals_pacific_war_mod_money_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/disonixures/7kgiFEO/new_bad_neighbors_2_trailer.pdfIn PDF document text
    • http://rujawobezixevib.iblogger.org/how_to_analyze_sales_data_in_python.pdfIn PDF document text
    • https://cdn.sqhk.co/pakiwujipubi/jiaHKjM/pibosaxepurafejote.pdfIn PDF document text
    • https://cdn.sqhk.co/jugemito/egchaP2/58887126315.pdfIn PDF document text
    • https://cdn.sqhk.co/nobutowug/geEjSCE/hero_hunters_pumpkin_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/limiwebu/egjgdif/there_s_a_butcher_around_no_poking.pdfIn PDF document text
    • https://cdn.sqhk.co/xuluriwu/sghJ8LP/descargar_head_ball_2_para_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/bepotedaxus/jbpjeCf/one_piece_god_valley_incident.pdfIn PDF document text
    • https://cdn.sqhk.co/neratimo/fdhcKHj/cbse_board_class_9_english_book_solution.pdfIn PDF document text
    • https://cdn.sqhk.co/bifoligi/ijfq3SV/8043470956.pdfIn PDF document text
    • https://cdn.sqhk.co/reretukida/gc2hf4A/53871014232.pdfIn PDF document text
    • https://cdn.sqhk.co/jasurisunav/cshjBRr/slither._io_cheat_codes_iphone.pdfIn PDF document text
    • http://nupesupo.mypressonline.com/13707931185.pdfIn PDF document text
    • https://cdn.sqhk.co/duvapegoleva/hcuw8hc/6839607020.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vuzexoba.rf.gd/practicing_the_presence_of_god_brother_lawrence_amazon.pdfIn PDF document text
    • http://fadosidenisuko.epizy.com/simple_present_tense_activities.pdfIn PDF document text
    • http://rawigukegopafot.onlinewebshop.net/41173541144.pdfIn PDF document text
    • http://poposumezaxek.rf.gd/boss_baby_season_2_subtitles.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifumofelu/sobupixuzadifoboka.pdfIn PDF document text
    • https://s3.amazonaws.com/dusined/abiotic_vs_biotic_factors.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e533.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE533 5216 bytes
SHA-256: 9a9cd8a28560bf93e43a0c65ac16db40e3229e0997473138567ee0226d1387a5
font_01_sfnt_off0000f71b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF71B 11620 bytes
SHA-256: 82f66629788c6b53c51371ead7349e8975afdf1d3ecaf5da675dc4b0d4d14264
font_02_sfnt_off00011ee1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EE1 16112 bytes
SHA-256: 275d0ef8f619a30f75d5b67021c85ffe51dbf44d82a44ecb2d07128ff93f9399

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