Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5e048aebd0a1705…

MALICIOUS

PDF

83.5 KB Created: 2021-03-23 21:05:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 5227208745a9101fdd40d7483b4718d9 SHA-1: bf10fe5a8137b418ca5d67019720641f690ad2d0 SHA-256: d5e048aebd0a1705c801fc666dd1dbe76194110a4498826308ea0b5c810951d7
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one prominently featuring 'ipod+touch+4th+generation+screen+replacement' in its query string, suggesting a lure for users seeking device repair information. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery via these links. No scripts were extracted, but the PDF structure itself is flagged as a link farm on disposable hosting, reinforcing the malicious nature.

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://jacksth.ru/strik?utm_term=ipod+touch+4th+generation+screen+replacement PDF link annotation
    • https://suvedezu.weebly.com/uploads/1/3/1/3/131379937/4569046.pdfIn PDF document text
    • https://bipozoxadedisaj.weebly.com/uploads/1/3/1/1/131164124/4888064.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449774/normal_600b4980e0004.pdfIn PDF document text
    • https://tigerabedudutid.weebly.com/uploads/1/3/5/3/135304069/629493.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428045/normal_5fdac52336d72.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452835/normal_604498c2db2ec.pdfIn PDF document text
    • http://rogevunesopu.medianewsonline.com/how_many_electrons_are_in_the_4d_orbitals_of_the.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475379/normal_6030df1a9e707.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489264/normal_5fe7bce6e49fa.pdfIn PDF document text
    • https://vipelunova.weebly.com/uploads/1/3/2/7/132712034/4692447.pdfIn PDF document text
    • https://mosejibufo.weebly.com/uploads/1/3/4/4/134437632/2806965.pdfIn PDF document text
    • https://xaxaguxoludu.weebly.com/uploads/1/3/4/5/134519627/mexizubawujuxi.pdfIn PDF document text
    • https://sarejazaxixosib.weebly.com/uploads/1/3/4/6/134633098/funuwibujilawiz.pdfIn PDF document text
    • https://muvepabeburok.weebly.com/uploads/1/3/1/4/131453329/rekifusinu-ribeju-meroburimas-povobizupaguvod.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/juzowilipi/white_vs_black_tesla_interior.pdfIn PDF document text
    • http://limufij.myartsonline.com/53358029456.pdfIn PDF document text
    • https://s3.amazonaws.com/fadadedezeker/comprehensive_analysis_report_sample.pdfIn PDF document text
    • https://s3.amazonaws.com/niporofez/cahier_de_vacances_maternelle_gs.pdfIn PDF document text
    • http://lawaxisagiwog.atwebpages.com/english_bad_words_list_with_meaning.pdfIn PDF document text
    • http://puzekuzabi.epizy.com/autumn_leaves_jazz_piano_sheet_music.pdfIn PDF document text
    • http://baxiziroj.epizy.com/biology_textbook_for_high_school.pdfIn PDF document text
    • https://s3.amazonaws.com/jixerubowi/95270595889.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_off00010945.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10945 5512 bytes
SHA-256: 0ae779f543a6c7eb2d49567ae7a7c26494b05284f5ae2c0a868087dc2a232b24
font_01_sfnt_off00011be2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BE2 10648 bytes
SHA-256: dd6dbe718c9408e8e85d47067e0792ff52a9e51ad2af495c3f39626dcb338b14

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