Malicious PDF — malware analysis report

Static analysis result for SHA-256 59193f6f408f015f…

MALICIOUS

PDF

73.5 KB Created: 2021-02-27 05:44:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 5c3d686db5311dcb9f26e85d80a4eddd SHA-1: d52f35bf733c175d131a0c412fb7549fce6415a2 SHA-256: 59193f6f408f015f68a5aa2e8429bae7a4453d97fb7e4ecb745860ef988f4599
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, suggesting a link farm or redirection to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains text related to search queries, reinforcing the lure of a search result.

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://mezovuduw.ru/123?utm_term=do+arch+support+cure+plantar+fasciitis PDF link annotation
    • https://vaseviga.weebly.com/uploads/1/3/3/9/133986607/ff76a711e072ff.pdfIn PDF document text
    • https://rebejudan.weebly.com/uploads/1/3/5/3/135316845/malezuwopefaj.pdfIn PDF document text
    • https://cdn.sqhk.co/vanewano/wjdhcDO/new_disney_cartoon_movies_2019_download.pdfIn PDF document text
    • https://cdn.sqhk.co/gupukutolet/DhjmEca/radio_flyer_go_kart_manual.pdfIn PDF document text
    • https://zinegekoxemajaj.weebly.com/uploads/1/3/4/7/134767253/gabud.pdfIn PDF document text
    • http://konobemozitu.iblogger.org/80343314509.pdfIn PDF document text
    • https://werakemil.weebly.com/uploads/1/3/5/9/135973214/4016096.pdfIn PDF document text
    • http://bezigex.iblogger.org/potopoju.pdfIn PDF document text
    • https://jemidezegin.weebly.com/uploads/1/3/0/8/130874295/xefatozefobir.pdfIn PDF document text
    • https://zizusufake.weebly.com/uploads/1/3/4/6/134646877/poxafejemumi-dunafowu-napirure-xidabigu.pdfIn PDF document text
    • https://supogile.weebly.com/uploads/1/3/1/6/131606666/c3dd88.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/gopuze/zomize.pdfIn PDF document text
    • https://s3.amazonaws.com/tesotiwapax/archeologia_subacquea.pdfIn PDF document text
    • http://repeputowuz.epizy.com/zikumuviluvoxuzukof.pdfIn PDF document text
    • https://s3.amazonaws.com/jixerubowi/dnd_fighter_guide_5e.pdfIn PDF document text
    • http://dolifusekaxug.epizy.com/the_beatles_album_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifawuvawot/packers_vs_bears_prediction_bleacher_report.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_off0000e329.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE329 5104 bytes
SHA-256: d626466681671e9a4474729c027c91ac6e714b0c68954a08241c16e658110fea
font_01_sfnt_off0000f486.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF486 10580 bytes
SHA-256: 44212e483e7f815602617b3be76db00dc4542e5899862388d5f8af6bfa61b7ec

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