Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdf7b0e820c5f032…

MALICIOUS

PDF

78.4 KB Created: 2021-03-02 09:40:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 2e90bcee2aca68ea6076b30ca8dd5942 SHA-1: e6238e18b841ebf2ec3e6653e3acc1503c760c9e SHA-256: bdf7b0e820c5f0320957215204b7cdcbbef51a84cdfe2e93f8911903416699e5
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many pointing to disposable hosting, and is flagged by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, contains references to a movie trailer, suggesting a lure for phishing or malware delivery. The presence of external URIs and link farm heuristics indicates an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/123?utm_term=monkey+wrench+gang+movie+trailer PDF link annotation
    • http://bibopasaxuvibu.mypressonline.com/sct_livewire_ts_6.0_powerstroke_install.pdfIn PDF document text
    • https://lesikikonojen.weebly.com/uploads/1/3/0/7/130740189/jalegakokuj-riguvev.pdfIn PDF document text
    • http://biotringel.shop/54338657110iqfkc.pdfIn PDF document text
    • http://siwosupegejolop.medianewsonline.com/how_to_use_soap_header_for_authentication_web_service_in_c.pdfIn PDF document text
    • https://tekigeja.weebly.com/uploads/1/3/1/3/131384442/lidip-vonamogogerilap-rigipofutarifuv.pdfIn PDF document text
    • http://copyright-infringement.business/metal_gear_solid_5_ps4_part_100_walkthrough5l231.pdfIn PDF document text
    • http://copyrightsupporthelpcenter.com/lux_meter_calibration_certificatexc6xv.pdfIn PDF document text
    • http://nabavawuzafurur.mygamesonline.org/how_to_clean_shark_vacuum_filter_lift_away.pdfIn PDF document text
    • http://nesobaka9.xyz/digital_media_advertisingq72zv.pdfIn PDF document text
    • https://wuxinaruniluxod.weebly.com/uploads/1/3/4/8/134882591/sotafakibejomilebaku.pdfIn PDF document text
    • http://zokupez.mygamesonline.org/71435236126.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vujipuxi.epizy.com/florida_used_car_bill_of_sale_form.pdfIn PDF document text
    • https://s3.amazonaws.com/nitajosasa/ninub.pdfIn PDF document text
    • http://duvasupe.epizy.com/nepan.pdfIn PDF document text
    • https://s3.amazonaws.com/tojabixefova/rapafan.pdfIn PDF document text
    • http://tiwatimab.atwebpages.com/53063949737.pdfIn PDF document text
    • http://samanoniminowut.epizy.com/32461650443.pdfIn PDF document text
    • https://s3.amazonaws.com/mexijegedakol/modern_digital_electronics_book.pdfIn PDF document text
    • https://s3.amazonaws.com/nupotukig/powidevubovamerar.pdfIn PDF document text
    • http://vowaxuf.rf.gd/petty_cash_template_excel_uk.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_off0000f37b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF37B 5356 bytes
SHA-256: 82400755ac8d62c74a199cc3b1e9da01ad01f6e8d84b405bf0b8703940139fca
font_01_sfnt_off000105b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105B7 11316 bytes
SHA-256: 84bfac998bf1c822c3062d34c5677810b73627ae2e177dde37bb97d69b4cf8d6

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