Malicious PDF — malware analysis report

Static analysis result for SHA-256 96a2b26c6c09c542…

MALICIOUS

PDF

85.1 KB Created: 2021-04-02 16:15:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3c59062e3e4958bda29e19f8e37feaaf SHA-1: 40dc47ed2088a0ed01bb924db854504ed97ae80d SHA-256: 96a2b26c6c09c542732855116aa430d67db218f92be92d32d4bb9d3153460bce
156 Risk Score

Malware Insights

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

This PDF document is classified as malicious, exhibiting characteristics of a phishing lure by impersonating a Kindle Fire 10 instruction manual. It contains a significant number of external links, suggesting a link farm or redirection scheme to distribute malicious content. The presence of numerous external URIs and the ML classifier's high confidence score indicate a strong likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/wix?keyword=kindle+fire+10+instruction+manual
    • https://cdn-cms.f-static.net/uploads/4390056/normal_6019cdb0391f2.pdf
    • http://rinujajija.getenjoyment.net/balarama_old_editions.pdf
    • https://nukivobiwej.weebly.com/uploads/1/3/4/0/134016752/puxulupizi.pdf
    • https://zudamuberul.weebly.com/uploads/1/3/4/8/134854759/jitiwulosofomub.pdf
    • https://natesikapepik.weebly.com/uploads/1/3/4/7/134750077/zetobidat.pdf
    • https://widufosonetorif.weebly.com/uploads/1/3/4/5/134598319/vujerurimaxaxajo.pdf
    • https://fanarise.weebly.com/uploads/1/3/4/3/134377412/zududuxonegarunaku.pdf
    • http://mumopajikex.mygamesonline.org/nikon_p-tactical_223_rifle_scope_-_4x-12x.pdf
    • https://static.s123-cdn-static.com/uploads/4423454/normal_6006a0bfbb0d2.pdf
    • https://sozobuxetezubu.weebly.com/uploads/1/3/4/5/134527793/kunitisirilafut.pdf
    • https://miwozowupib.weebly.com/uploads/1/3/2/6/132681947/rinafolezako-suvivovudiwen-ralelev.pdf
    • https://sisajubiji.weebly.com/uploads/1/3/0/9/130969075/4231733.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/ebc46610-9494-4f87-ac66-b5a0da91fe23/16183685732.pdf
    • https://uploads.strikinglycdn.com/files/0e9e40ab-dd23-4690-b74a-98a683cf1a16/xiwetima.pdf
    • https://uploads.strikinglycdn.com/files/ac0b7b45-2e44-4b3c-be54-933051623bb6/journal_entries_format_in_accounting.pdf
    • https://uploads.strikinglycdn.com/files/72d41603-3e84-4b25-9b6b-4e6e3b521de1/56622894277.pdf
    • http://loxupobupibim.atwebpages.com/morfologi_lernaea_sp.pdf
    • https://uploads.strikinglycdn.com/files/222c9c79-9bdf-4178-913a-36e20b4b8f12/standard_of_excellence_book_2_flute_recordings.pdf
    • http://ziwivazud.onlinewebshop.net/effective_academic_writing_1_oxford.pdf
    • https://uploads.strikinglycdn.com/files/9fd1643e-b91b-4759-9ecf-f9928222c164/janizemibobogovunajesaniv.pdf
    • http://namepafubi.atwebpages.com/46371307828.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010fe1.bin
f5e3ec25df39eba090b39ed13021d60bcf1e70b04e459bda2628cab546198a36		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10FE1 5332 bytes
font_01_sfnt_off000121f2.bin
037a28fca7d489612e7a5020d135bd38bfe3db35cc2392d284f51ecf665a8f3c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x121F2 10848 bytes

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