Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bdfc8ad8569b2e8…

MALICIOUS

PDF

72.9 KB Created: 2021-03-04 23:57:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 4e0541b8c613adafee752f802d022ea5 SHA-1: 2be480969474aef703a807b98ba92d19b1463c87 SHA-256: 5bdfc8ad8569b2e8aa52a4a3d607588648f29e97944acfbcea2e92e443346725
136 Risk Score

Malware Insights

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

The PDF file contains a heuristic indicating it's a phishing lure for free downloads, directing users to a suspicious URL. ML classification and ClamAV also flagged it as malicious. While no scripts were extracted, the PDF structure and embedded URI suggest a phishing attempt to redirect users to a malicious site.

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://resalured.ru/strik?utm_term=how+to+adjust+aeron+remastered PDF link annotation
    • http://pegijegur.mygamesonline.org/molecular_biology_techniques_a_classroom_laboratory_manual_download.pdfIn PDF document text
    • https://cdn.sqhk.co/vunalogivefu/aOvGwhc/operation_outbreak_map.pdfIn PDF document text
    • http://sijemogezabusa.sportsontheweb.net/78835106554.pdfIn PDF document text
    • https://cdn.sqhk.co/vitimosugu/fhejajh/39977131207.pdfIn PDF document text
    • https://cdn.sqhk.co/tivanosox/iaSrZhe/17019856840.pdfIn PDF document text
    • http://wonnaturila.space/numpy_in_python_tutorial4405d.pdfIn PDF document text
    • http://menformula.xyz/abdul_kalam_novels_in_hindi7td14.pdfIn PDF document text
    • http://sberetransfer.online/eulogy_template_for_dad_ukxgjkx.pdfIn PDF document text
    • http://fruit-citrus.space/arduin_grimoire_downloado8l5j.pdfIn PDF document text
    • http://yognat.space/34546258000lqcq1.pdfIn PDF document text
    • https://cdn.sqhk.co/putuziboki/cLifjdV/minecraft_pixels_mod.pdfIn PDF document text
    • http://bagerisevi.scienceontheweb.net/23629987142.pdfIn PDF document text
    • http://dakisemakegag.sportsontheweb.net/kenmore_gas_oven_repair_manual.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/zatasipezeg/71675428165.pdfIn PDF document text
    • http://ziwivazud.onlinewebshop.net/lukevat.pdfIn PDF document text
    • https://s3.amazonaws.com/bajuse/60166928356.pdfIn PDF document text
    • https://s3.amazonaws.com/tobojelusiwi/casio_g_shock_ga_110_manual_cz.pdfIn PDF document text
    • http://laxukumelukadut.myartsonline.com/nisafogibifo.pdfIn PDF document text
    • https://s3.amazonaws.com/gowupuzokowuxes/android_update_for_samsung_j7_2015.pdfIn PDF document text
    • http://supuwevul.atwebpages.com/lexus_gx_460_price_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/nuselufuzo/25984382031.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_off0000e24f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE24F 5068 bytes
SHA-256: 35eed5ac2635d3214c72235106bb1291f648db891859ca5bcdce7e45a56c2d74
font_01_sfnt_off0000f386.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF386 10164 bytes
SHA-256: eef3005f0484ffed5b65cc2cabb34592133b99050f24c6d7d0fbdcca08fde6b2

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