Malicious PDF — malware analysis report

Static analysis result for SHA-256 db86e84a593649de…

MALICIOUS

PDF

88.8 KB Created: 2021-03-28 12:51:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: db3215d5d2dac6f222fcd835575a22bb SHA-1: 0e069747fb0eb7583aa4e7b487076f668a145718 SHA-256: db86e84a593649decb8dbb9519221693b350e66fbc8c6063fca7304064781ae9
126 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable hosting, and is flagged by ML classifiers and ClamAV as malicious. The document's structure and embedded URLs suggest it is designed to redirect users to potentially harmful websites, likely for phishing or malware distribution. No scripts were extracted, but the overall pattern indicates a malicious document intended to be delivered as an attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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/123?utm_term=international+journal+of+dermatology+case+report PDF link annotation
    • https://cdn.sqhk.co/jezumasulej/d4riage/46855188405.pdfIn PDF document text
    • http://garantiya62.ru/what_are_the_strengths_and_weaknesses_of_transformational_leadershipzvpzm.pdfIn PDF document text
    • http://xovasolakaxewo.22web.org/relative_clauses_exercises_handout.pdfIn PDF document text
    • http://arenda-comp.space/laptop_antivirus_software_windows_7w06az.pdfIn PDF document text
    • https://cdn.sqhk.co/mipekakiri/jeiiBjh/niraneziwotozesize.pdfIn PDF document text
    • https://cdn.sqhk.co/fujotojaxob/P0j5ggq/storyline_online_carla_s_sandwich.pdfIn PDF document text
    • http://wizimesataw.22web.org/85946504239.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500208/normal_6054dcaddff9a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475725/normal_5ffbf6470ce1c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410016/normal_6052d80c64b5d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480161/normal_5fc71b925a639.pdfIn PDF document text
    • http://dmdmassage.com/zonupaxtgje8.pdfIn PDF document text
    • https://cdn.sqhk.co/xevowuto/futgjja/music_mp3_download_free_copyleft_apk.pdfIn PDF document text
    • http://junemam.22web.org/vujuvekapododiluxe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490125/normal_6013267975e60.pdfIn PDF document text
    • http://wikatugakuvifi.iblogger.org/us_citizenship_test_2019_one_answer.pdfIn PDF document text
    • http://hydrofthol.space/735779124530c2lh.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e85625e8-91d5-48c2-95a4-67b7b95d5b39.filesusr.com/ugd/b97a97_f01cca082f3a46848344b2b5418cca1a.pdf?index=trueIn PDF document text
    • https://d8acad56-eb9a-42d1-a06c-a695c5b02328.filesusr.com/ugd/0ad6c7_7d703426694345a6bd24afbb2ef6632a.pdf?index=trueIn PDF document text
    • http://tukorokibenej.epizy.com/civil_trial_objection_cheat_sheet.pdfIn PDF document text
    • https://19004eff-8f5e-45b0-b15a-9fbdbd99e39d.filesusr.com/ugd/578ea4_8cd5452846b0416982e33225d4a46ddb.pdf?index=trueIn PDF document text
    • https://ab60d57a-1f92-408f-9079-0b325776b613.filesusr.com/ugd/724fb5_f824b4e0435c4da5a2959539e6be1367.pdf?index=trueIn PDF document text
    • http://lunofalogejutu.epizy.com/lotebuf.pdfIn PDF document text
    • http://kimanafidigij.epizy.com/dd_5e_goliath_stat_block.pdfIn PDF document text
    • http://vugapadilubokis.epizy.com/filmywap_2017_bollywood_movies_hd_480p.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_off00011ad3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AD3 5592 bytes
SHA-256: 3838131bd86acaff1de24c8c53b3e45088dca073e53a3e6961260be695d7eed2
font_01_sfnt_off00012dd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DD3 11420 bytes
SHA-256: 598af2e52f9cc6132e239b7c34bd9f67d14b32462d8cf35512b7bc57c5380ced