Malicious PDF — malware analysis report

Static analysis result for SHA-256 db75c86a3aafad24…

MALICIOUS

PDF

78.4 KB Created: 2021-05-08 23:52:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: bcbed368001ebdfc2f4223c7095d407c SHA-1: 9d3a82430c8e0b52bb2d528151d55ae5263fcbf1 SHA-256: db75c86a3aafad2442a86aeb26ca324265eaf4e946f72177a5d860d3ec94b053
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 0.9996

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://vilenefex.ru/strik?utm_term=rancilio+silvia+price+philippines PDF link annotation
    • http://ipai.online/89459189655fokh1.pdfIn PDF document text
    • http://bupetud.xyz/9228192914m0lay.pdfIn PDF document text
    • https://cdn.sqhk.co/woteruzid/Z4XNjeX/69995808989.pdfIn PDF document text
    • https://cdn.sqhk.co/sakixowofeg/diejjjj/chessbase_light_9_free.pdfIn PDF document text
    • http://pesale.pro/still_i_rise_poem_symbolismqw1hl.pdfIn PDF document text
    • https://dapobatajixafaw.weebly.com/uploads/1/3/4/3/134310280/duwerezaxozuka_wejubavosetaze_pusibod.pdfIn PDF document text
    • https://cdn.sqhk.co/jupozaregu/wif40wn/st_patrick_s_cathedral_livestream_mass_today.pdfIn PDF document text
    • https://fodonisegijiwos.weebly.com/uploads/1/3/1/4/131437376/padir_bepodidekobok_midafenaxiba_zuvaseze.pdfIn PDF document text
    • https://cdn.sqhk.co/seponidozit/ghbjshf/xiwojet.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sewamos/fisher__paykel_panel_ready_built-in_french_door_refrigerator.pdfIn PDF document text
    • https://s3.amazonaws.com/wowonesoribu/quarterly_performance_report_stpi.pdfIn PDF document text
    • https://s3.amazonaws.com/patotale/xirodirasifabukafib.pdfIn PDF document text
    • https://s3.amazonaws.com/wezukep/strength_and_conditioning_training_for_weight_loss.pdfIn PDF document text
    • https://s3.amazonaws.com/wizakokowe/hobbs_and_shaw_fzmovies.pdfIn PDF document text
    • https://s3.amazonaws.com/timituvupame/raletabukanutisuxag.pdfIn PDF document text
    • https://s3.amazonaws.com/tobovunoberiki/what_are_the_different_types_of_managers.pdfIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/64460004383.pdfIn PDF document text
    • https://s3.amazonaws.com/pazatuv/sibugufajuralemifow.pdfIn PDF document text
    • https://s3.amazonaws.com/tojabixefova/apush_chapter_10_review_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/folexapurilowe/mere_christianity_study_guide_questions_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwimadaneb/what_is_the_correct_order_to_watch_marvel_movies_in.pdfIn PDF document text
    • https://s3.amazonaws.com/gusule/94359263213.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_off0000f4cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4CD 5088 bytes
SHA-256: 3683e963525be66d337d9f56f79bcf1a2d06519a71af20146525037a1d29466d
font_01_sfnt_off00010620.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10620 11212 bytes
SHA-256: a5a016409ffdd5d556dcd1e95fc57b3fd9eef0e12743bd869ea914176359727a

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