Malicious PDF — malware analysis report

Static analysis result for SHA-256 36a970ddf1f312e8…

MALICIOUS

PDF

82.2 KB Created: 2021-03-18 04:44:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 6d746daa0cd939f6c92fb5fc2dbe930f SHA-1: 80229276f2e74442bd73191ec17fe6b1398b5a75 SHA-256: 36a970ddf1f312e84f49e4d9053f8243405700f2143d97bdb819ee3e6cd139e9
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9957

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://dugedepap.ru/wix?keyword=student+study+guide+chapter+3+demand+worksheet+answers PDF link annotation
    • https://cdn.sqhk.co/bapisolel/jbu9jhb/best_dog_ball_launcher_gun.pdfIn PDF document text
    • http://vinulologezew.iblogger.org/nulalesajigopuretevi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424672/normal_604aa35c09dfa.pdfIn PDF document text
    • https://cdn.sqhk.co/dekavaka/ihxjcig/68333063806.pdfIn PDF document text
    • https://cdn.sqhk.co/daxegajok/hdeLMvq/startup_dell_laptop_in_safe_mode.pdfIn PDF document text
    • https://jigaposu.weebly.com/uploads/1/3/5/3/135397088/2118224.pdfIn PDF document text
    • http://getyourscore.info/bhaiya_dooj_ki_video6yuml.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379030/normal_6011441f89647.pdfIn PDF document text
    • https://cdn.sqhk.co/jekefebiba/gjdjgii/strategic_management_process_model.pdfIn PDF document text
    • https://zujafewisanepo.weebly.com/uploads/1/3/4/3/134322282/rejivogob.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379046/normal_603aeeff7df51.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414339/normal_601a2beb82ebf.pdfIn PDF document text
    • http://temppicture.xyz/junior_achievement_finance_park_student_workbook_answersedx1b.pdfIn PDF document text
    • http://zuvels.xyz/followers_and_likes_for_tiktok_free_app_downloadj7wqg.pdfIn PDF document text
    • http://bavomobes.22web.org/nofedewemitumu.pdfIn PDF document text
    • http://xtreme-sport.ru/denon_avr_2113_firmware_update_usb5jip2.pdfIn PDF document text
    • https://gogesatita.weebly.com/uploads/1/3/4/3/134321397/694493674e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387243/normal_5fcb584d5fd26.pdfIn PDF document text
    • https://cdn.sqhk.co/pedagukar/jd3ig9H/25768682013.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lilipokujiluzi.epizy.com/welodaweki.pdfIn PDF document text
    • http://pamakejexo.epizy.com/99541264850.pdfIn PDF document text
    • http://lojofoverom.epizy.com/rebivetorewulijisojiju.pdfIn PDF document text
    • http://lubozogemodusa.epizy.com/45022372123.pdfIn PDF document text
    • http://jewigetujano.epizy.com/does_a_w_look_bad_on_transcript_reddit.pdfIn PDF document text
    • http://relipig.epizy.com/where_does_navy_training_take_place.pdfIn PDF document text
    • http://xotivigafutuzul.epizy.com/dotetu.pdfIn PDF document text
    • http://liwajefafujud.rf.gd/43090848463.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_off00010147.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10147 5980 bytes
SHA-256: 89c2d5f205fe3a7ef2e78f998b6252ec018dc3a2f0d84f4c03880a17de1b8265
font_01_sfnt_off00011595.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11595 10820 bytes
SHA-256: c18485d250dd36207db74511e56be02f286030323630ee44d39ecd52d7ed5af1

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