Malicious PDF — malware analysis report

Static analysis result for SHA-256 cac062be9a5a81cd…

MALICIOUS

PDF

79.4 KB Created: 2021-03-16 16:39:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: a2634fcad2faf62d789bfa40eeb8609b SHA-1: 2559c06f7e15ac40f0c89fca0316045578b8173f SHA-256: cac062be9a5a81cddaa33b725afc88c7fd5f802f058863ffe7508c56c974dd6e
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable or unknown hosting services, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document designed to redirect users to harmful sites.

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 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://mezovuduw.ru/wix?keyword=graphing+nonlinear+systems+worksheet PDF link annotation
    • https://wuliwedifa.weebly.com/uploads/1/3/4/7/134753749/8fe4b92be7eaeb2.pdfIn PDF document text
    • https://fubudebuz.weebly.com/uploads/1/3/2/7/132712336/tixogifogone-xanekajofuxinod.pdfIn PDF document text
    • http://wonizojaru.scienceontheweb.net/wumiguwi.pdfIn PDF document text
    • http://tiwimifozukimu.medianewsonline.com/what_is_a_caliper_used_for_brainly.pdfIn PDF document text
    • https://rafopovuweke.weebly.com/uploads/1/3/2/7/132740485/464aac8.pdfIn PDF document text
    • http://mevukavotidu.getenjoyment.net/11748852443.pdfIn PDF document text
    • http://nawilojobate.iblogger.org/30207202657.pdfIn PDF document text
    • https://variwigegepug.weebly.com/uploads/1/3/4/3/134348450/vuwowalume.pdfIn PDF document text
    • https://pakedarisibibo.weebly.com/uploads/1/3/4/5/134501134/zipajimison_nakilojawizivud_dekaf.pdfIn PDF document text
    • http://felagem.getenjoyment.net/effective_leadership_traits.pdfIn PDF document text
    • https://kigivalivago.weebly.com/uploads/1/3/4/3/134337689/mapafakakeb_zoxanijagixid_gefaroponux_neroligi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vogojitipam.epizy.com/yeh_chikitha_video_song_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8ed7bbb-5cea-422c-afdd-fe37b7d7ccfa/tipab.pdfIn PDF document text
    • http://gudugapapilile.atwebpages.com/what_is_the_first_mortal_instruments_movie.pdfIn PDF document text
    • http://vubixegigag.rf.gd/ninazafedimugag.pdfIn PDF document text
    • http://weponigonimogo.myartsonline.com/tejom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cb280cb-29c1-45cd-8a73-70d6cbb623a9/hunger_games_mockingjay_part_1_full_movie_download_in_tamil_dubbed.pdfIn PDF document text
    • http://notaruk.rf.gd/streamline_english_departures_free.pdfIn PDF document text
    • http://bumejefivoxigo.myartsonline.com/dimemutitixuxazose.pdfIn PDF document text
    • http://beperedusewigu.epizy.com/jatabi.pdfIn PDF document text
    • http://vajapojaperusu.myartsonline.com/36389824766.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_off0000f78b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF78B 5520 bytes
SHA-256: 7253a6937635dd2e2077efe6bffa58e1a9308fc5fce3da75e145164e002cbb43
font_01_sfnt_off00010a42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A42 10984 bytes
SHA-256: 1d48c12a1e167bb5d251df2af55cb4600350ad2f93db0898c5ecc31319c2e88b

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