Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff5800460c1d61aa…

MALICIOUS

PDF

82.4 KB Created: 2021-03-30 01:16:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 98c744d50b1eb3e35497b0eab534e24c SHA-1: c1990e816a184de1b50c2f187b1b9560454c0b61 SHA-256: ff5800460c1d61aa8d1ebffffd344e6386da85f6c54c09d28bb5aed3e75927cf
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, with one prominent URL suggesting a lure related to 'edit pdfs program'. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of multiple disposable hosting links and link farms further supports a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/award?keyword=edit+pdfs+program PDF link annotation
    • https://cdn.sqhk.co/liminekaj/Siaheie/stick_fight_battle_shadow_warrior_mod_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447888/normal_600d2516ae259.pdfIn PDF document text
    • http://jumbochecker.com/14028075349f9gdr.pdfIn PDF document text
    • https://cdn.sqhk.co/kepolapawef/hjdijag/true_caller_id_apk_free.pdfIn PDF document text
    • https://cdn.sqhk.co/sipebesoxu/CbT1ghp/everfi_module_5_credit_scores_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/jotepomi/lAicqkc/21558616189.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481831/normal_5fcdd0a128f01.pdfIn PDF document text
    • http://kafalukuwemi.mygamesonline.org/rafewefo.pdfIn PDF document text
    • http://reznitskygallery.com/pak_navy_jobs_2021_matric_basek1c2u.pdfIn PDF document text
    • http://sevisotesasare.iblogger.org/losuziverevoxogofenibeb.pdfIn PDF document text
    • https://cdn.sqhk.co/gowamojon/jjAifDs/christian_cinema_free_movie_code.pdfIn PDF document text
    • http://kavakedego.scienceontheweb.net/excel_cheat_sheet.pdfIn PDF document text
    • http://koxivesuvif.mypressonline.com/mugogedez.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://kiwizenodemi.epizy.com/jeketulaweraro.pdfIn PDF document text
    • http://getetir.epizy.com/94176141327.pdfIn PDF document text
    • http://wokoxut.epizy.com/casio_edifice_5041_manual.pdfIn PDF document text
    • http://bulojidaxuxuvod.rf.gd/57104907464.pdfIn PDF document text
    • http://dopovis.myartsonline.com/anatomia_ano_rectal.pdfIn PDF document text
    • http://wajalapivibobi.epizy.com/dj_awan_axello_terbaru_2018.pdfIn PDF document text
    • http://sedepijenokarol.epizy.com/basic_statistical_tests.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_off0000f659.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF659 4852 bytes
SHA-256: 9f42ba96219f2a9b14f89cd4ab963f14f5f0bf27160e5c9916a76805a88be999
font_01_sfnt_off000106d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106D7 11208 bytes
SHA-256: 0f5754588f1622bc275d5a5d496fd643077da3daca321e8a9fff63eb51966250
font_02_sfnt_off00012c77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C77 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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