Malicious PDF — malware analysis report

Static analysis result for SHA-256 59c5348541e527bc…

MALICIOUS

PDF

75.1 KB Created: 2021-04-01 02:54:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 00873eb1060cf5aff2620700a80d8220 SHA-1: 22074e6dad976ff813a78920364f53dd7e071b4c SHA-256: 59c5348541e527bc3d9b2fc078ab4dddf8c8caa4be67ca1152eca5b9978a68f9
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics indicate the PDF acts as a link farm, directing users to multiple suspicious URLs, some of which are hosted on disposable domains. The presence of 'LOLBin token sequence in document text' suggests an attempt to disguise malicious commands or URLs within the document content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://maypoin.ru/award?keyword=the+harpercollins+study+bible+new+revised+standard+version+pdf PDF link annotation
    • https://cdn.sqhk.co/sasuveze/cgeie4N/xovekugawos.pdfIn PDF document text
    • http://francobusiness.com/sulipugdqbv.pdfIn PDF document text
    • http://topstudy.fun/bra_size_guide_us_to_uk3kw7g.pdfIn PDF document text
    • http://qrettalq.online/scorpio_2020_safety_ratingswxihm.pdfIn PDF document text
    • http://de-bewertung-id2842384.icu/petsafe_citronella_collar_charger24plw.pdfIn PDF document text
    • http://6gusevshop.space/integrated_science_course_3_answersdr3sl.pdfIn PDF document text
    • http://com-servers.online/ferojixuw6bq70.pdfIn PDF document text
    • https://cdn.sqhk.co/silinetufid/jlhjz3u/70690835590.pdfIn PDF document text
    • http://twenty-promo2020.ru/zosowalmrsg.pdfIn PDF document text
    • https://cdn.sqhk.co/xolanikipiz/Eceggij/high_end_women_s_shoe_designers.pdfIn PDF document text
    • http://thehensleys.org/89687894327mjrc2.pdfIn PDF document text
    • https://cdn.sqhk.co/sutazojawote/hgjbCjh/tixubevokata.pdfIn PDF document text
    • https://cdn.sqhk.co/mosepoxik/Fgighz9/carte_de_la_republique_democratique_du_congo_afrique.pdfIn PDF document text
    • https://cdn.sqhk.co/togixulala/dkYijja/zoho_crm_software.pdfIn PDF document text
    • https://cdn.sqhk.co/perajomipe/jd3jjgi/simpleplanes_flight_simulator.pdfIn PDF document text
    • https://cdn.sqhk.co/bumogebiz/9Mgf0hb/game_of_thrones_s01e02_the_kingsroad_arabic_subtitles.pdfIn PDF document text
    • http://legiontry.online/how_to_draw_curly_anime_hair_boye53rw.pdfIn PDF document text
    • http://skywonder.space/rukufoxotikolokuvenmy4te.pdfIn PDF document text
    • https://cdn.sqhk.co/nawamuzimosu/RTjfihS/android_app_store_slack.pdfIn macro / runtime command snippet
    • http://skywonder.space/rukufoxIn macro / runtime command snippet
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pobixedele/hydroxyapatite_formation_process.pdfIn PDF document text
    • https://s3.amazonaws.com/juduk/offline_bingo_games_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/pokorevalaxex/psat_practice_test_2_answers_fall_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/juduk/kejawitunanoluja.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_off0000e697.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE697 5584 bytes
SHA-256: 7af7bd6fcce417a2adc9fae95acdd3e9ab73b08c6cbfe2df889835cf376318da
font_01_sfnt_off0000f9a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9A4 10820 bytes
SHA-256: b95e08b41d81d08b893520ab0b046028cdc7f7a6f6e516139499b69fec27945c