Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c99092441baeda8…

MALICIOUS

PDF

75.6 KB Created: 2021-03-04 04:44:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: cd92884c9864d8e620b5d4c41ff9bcd5 SHA-1: a6dddfdf9c1568f3fba5e7d58f9623de2180e509 SHA-256: 4c99092441baeda86b5ab71a2a68a31518d81d171eb4634d03f676e45b15613e
126 Risk Score

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://kuzutuzo.ru/award?keyword=how+to+draw+easy+stuff+but+cool PDF link annotation
    • http://dazixetenulega.22web.org/autodesk_sketchbook_pro_apk_for_pc.pdfIn PDF document text
    • http://gexedufez.22web.org/application_letter_for_college_admission_sample.pdfIn PDF document text
    • http://kafalukuwemi.mygamesonline.org/81031713335.pdfIn PDF document text
    • http://pesuloduf.medianewsonline.com/wotusamubipos.pdfIn PDF document text
    • http://mobufuwiwid.medianewsonline.com/why_are_short_sentences_used_in_writing.pdfIn PDF document text
    • http://zodatowafe.getenjoyment.net/tewelowesip.pdfIn PDF document text
    • https://balixilime.weebly.com/uploads/1/3/1/3/131398392/c9222489.pdfIn PDF document text
    • https://vakogiguwowokel.weebly.com/uploads/1/3/0/7/130775334/5680361.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422373/normal_5fce82ec85146.pdfIn PDF document text
    • http://momarivido.mypressonline.com/what_books_do_you_read_in_ap_english_language.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374522/normal_601041777a830.pdfIn PDF document text
    • http://jokojujut.medianewsonline.com/netekodiposopekiditizivub.pdfIn PDF document text
    • http://xunarepozufuz.mygamesonline.org/mikekurexog.pdfIn PDF document text
    • https://mamulexujixi.weebly.com/uploads/1/3/5/3/135390653/wusan_defab_bibidusowif_tojasabafuj.pdfIn PDF document text
    • http://sepoxudozixo.sportsontheweb.net/45581992754.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ligujizulogi.atwebpages.com/what_are_examples_of_behavioral_interview_questions.pdfIn PDF document text
    • http://mowesedapi.epizy.com/new_punjabi_song_2019_bestwap.pdfIn PDF document text
    • http://rogidisili.rf.gd/41517276612.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_off0000ecbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECBE 5312 bytes
SHA-256: 931842dc807ce3eb30b293c601edae0d6608a0d50ec1b9b41a73adffb7c84961
font_01_sfnt_off0000feef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEEF 10152 bytes
SHA-256: 08cfdcb2f1d8beaf6ef7917f106397c6c4e01808edfc71a76ef4c662ff9dbca6