Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1a00e548823540f…

MALICIOUS

PDF

79.0 KB Created: 2021-04-01 18:49:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: dafd3dff47ecfd7238598ce1293aba45 SHA-1: 02fa5cbb1b23ed66c8bae598e7d79f6661a00f84 SHA-256: b1a00e548823540f9f12b92cbfb124e8358669d1929b5f30299ae6f174aee934
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs pointing to disposable domains, suggesting a phishing or malicious content distribution scheme. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a link farm on disposable hosting, further supporting malicious intent. Although no scripts were explicitly extracted, the ML classifier and ClamAV detection strongly indicate malicious behavior, likely involving redirection to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://botokaw.ru/aws?utm_term=how+to+sync+a+directv+remote+with+receiver PDF link annotation
    • https://cdn.sqhk.co/kosenopelid/ghdcvjh/rogulozotuduxana.pdfIn PDF document text
    • http://palikexifumalam.mywebcommunity.org/70385955013.pdfIn PDF document text
    • https://cdn.sqhk.co/rekubapapup/h0S9Hus/fizenadonovupedav.pdfIn PDF document text
    • http://agencymedia-ig.com/jipexinl8xm.pdfIn PDF document text
    • http://gixapedotamerow.mywebcommunity.org/10th_class_math_solution_punjab_text_board_pakistan.pdfIn PDF document text
    • https://cdn.sqhk.co/burexewejam/09jdhbI/animal_skin_rugs_for_sale_south_africa.pdfIn PDF document text
    • http://slmit.space/xotifalalonede10ko2.pdfIn PDF document text
    • http://forisawidokomor.sportsontheweb.net/brazilian_portuguese_course.pdfIn PDF document text
    • https://cdn.sqhk.co/gipagigo/ii3Zz6C/cute_kawaii_backgrounds_for_ipad.pdfIn PDF document text
    • http://tb-films.ru/fomebivomanoxukaxixui9h54.pdfIn PDF document text
    • http://dawexefif.getenjoyment.net/99_names_of_allah_in_tamil_free_download.pdfIn PDF document text
    • http://bathforlegs.xyz/furubosisiwuxitonom5qyg.pdfIn PDF document text
    • http://lebedugipul.mywebcommunity.org/roderegumuwefexasabig.pdfIn PDF document text
    • http://xugaguf.mypressonline.com/exemple_cahier_de_charge_site_web_dynamique.pdfIn PDF document text
    • https://cdn.sqhk.co/talidapato/1mhcgsv/best_music_player_app_for_iphone_2020.pdfIn PDF document text
    • http://digitalmedialit.com/5268945767jgzp8.pdfIn PDF document text
    • https://cdn.sqhk.co/fupokonabat/icdkJjc/24189834758.pdfIn PDF document text
    • https://cdn.sqhk.co/dodufiruw/gcojdha/fusidilopupadibarab.pdfIn PDF document text
    • https://cdn.sqhk.co/pisapaxosabo/Sjcijhj/67720797521.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/sefepugolupalax/84085128287.pdfIn PDF document text
    • https://s3.amazonaws.com/fipijife/28541597907.pdfIn PDF document text
    • https://s3.amazonaws.com/vufuzewasi/what_kind_of_battery_does_a_movado_watch_take.pdfIn PDF document text
    • http://torejejowomu.myartsonline.com/john_deere_js30_carburetor_removal.pdfIn PDF document text
    • https://s3.amazonaws.com/savukojubusum/71678633998.pdfIn PDF document text
    • https://s3.amazonaws.com/sakaburepagase/pudepotatifawiwe.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_off0000f5ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5EE 5364 bytes
SHA-256: 07e192e2d383d9bd0cadea71eb7518dd4dd4cdbfe52adf7f1c26b9f727c41a38
font_01_sfnt_off0001081a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1081A 11088 bytes
SHA-256: bb437e21cffb54f6a6d89084a175a1b0a99b1cea76693210f641f7fda04b0c16

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