Malicious PDF — malware analysis report

Static analysis result for SHA-256 417441a56e50f56a…

MALICIOUS

PDF

85.9 KB Created: 2021-04-11 14:11:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 317f3cb24ce274aad06d7a9c5cfd3541 SHA-1: 0393e91bf28548cc2d1ed8a88b38a5bb4d58188e SHA-256: 417441a56e50f56a0692812e43659c11b05d0e07f14f2c9f4d666a30692e86a1
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document body, though heavily obfuscated, suggests a lure related to movie subtitles, which is a common phishing tactic. The presence of numerous external URIs, including one pointing to 'jumiwimov.ru', suggests the document is part of a link farm designed to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jumiwimov.ru/strik?utm_term=monster+2014+korean+movie+english+subtitles+download PDF link annotation
    • https://cdn.sqhk.co/xafiguzi/jdHijge/galaga_arcade1up_countercade.pdfIn PDF document text
    • https://cdn.sqhk.co/kosibowo/15D9UT4/castle_defence_mod_apk_download.pdfIn PDF document text
    • http://com-signto6.xyz/xegokosegozinalejifomapu7hpyu.pdfIn PDF document text
    • http://everydayy.fun/aprender_ingles_escuchandobengo.pdfIn PDF document text
    • http://ital-girl.space/sindrome_de_ulises6i557.pdfIn PDF document text
    • http://mysteps.online/los_juegos_del_hambre_sinsajo_castbrbkl.pdfIn PDF document text
    • http://finoginujowiwi.mypressonline.com/a_midsummer_nights_dream_synopsis_sparknotes.pdfIn PDF document text
    • http://fanisore.sportsontheweb.net/ancient_africa_history.pdfIn PDF document text
    • http://mihetos.xyz/entergy_ms_quick_pays4k2h.pdfIn PDF document text
    • http://midakurapujif.mypressonline.com/aha_bls_provider_manual.pdfIn PDF document text
    • http://kevebofuru.medianewsonline.com/48869920128.pdfIn PDF document text
    • http://nibakelenixezas.getenjoyment.net/dokekepelote.pdfIn PDF document text
    • http://swiss-gear.store/ridediwisepajotokujabale69zjp.pdfIn PDF document text
    • http://elerctum.org/35407590876et01i.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f519264f-42f3-4d46-9009-9206830ab23e/kelavumowilixene.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0d0afcb-5a28-4104-b2c7-4927cb0c1c7f/72425597109.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52842283-5ef8-499e-be73-5501bf47f7e9/denow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe91ac8a-b19f-4c4f-9ba3-b9e6ae11c091/christmas_themed_quiz_questions_and_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19948f9c-44e7-46da-ad3f-b99138e3dba7/56307596495.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB6F 5000 bytes
SHA-256: 5163b03a51bddf58e8caf7d1c6e201730e27356200f5e6e50395f166566c77cd
font_01_sfnt_off00010d04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D04 6016 bytes
SHA-256: 0f1a35ab3c7547aaa31ca2935f0e7a5aa0c7548b5ab33cff103a3d6a04c19576
font_02_sfnt_off00012177.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12177 11288 bytes
SHA-256: 317fb90736042f5fd66e99e8e580a9f44f5ff380664a413fabb88d01376a015c

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