Malicious PDF — malware analysis report

Static analysis result for SHA-256 d48c6f772d1988cd…

MALICIOUS

PDF

64.1 KB Created: 2021-02-22 18:30:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 1e93919cbba5b8012b6c880c3729d062 SHA-1: d044018ec05a0beb1519a5cd40797ca58ab37a03 SHA-256: d48c6f772d1988cd9195c6bba57a2c4c02330f99b5730d792c0b2425aef6669f
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically identified as a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful sites.

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://leonvi.ru/wix?keyword=super+nintendo+emulator+apkpure PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4412583/normal_5fde39fb64ed0.pdfIn PDF document text
    • http://runavowof.22web.org/what_are_the_rules_of_parentheses_in_math.pdfIn PDF document text
    • https://cdn.sqhk.co/vafizolubev/kLgjhf9/vejowalosefanonanuxasib.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375352/normal_6008882f7afc7.pdfIn PDF document text
    • http://kreativoblako.com/todigetedjxgzt.pdfIn PDF document text
    • https://cdn.sqhk.co/pinofizulag/ibD1geH/23669690319.pdfIn PDF document text
    • https://cdn.sqhk.co/vejurumilef/djtMugd/responsive_website_templates_free_download_w3layouts.pdfIn PDF document text
    • http://wexebigusokata.iblogger.org/96040465080.pdfIn PDF document text
    • https://cdn.sqhk.co/bugininaxi/hepEHHA/earth_now_nasa_app.pdfIn PDF document text
    • http://gufutaca1.xyz/lomizawamugasinowavb2c1.pdfIn PDF document text
    • http://jinitevuwug.iblogger.org/agile_project_management_certification_pmi.pdfIn PDF document text
    • http://jezojarugeboz.22web.org/whatsapp_play_store_free.pdfIn PDF document text
    • http://rabejagoruwobol.66ghz.com/jadagegeveni.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://junimufik.epizy.com/cules_son_los_animales_que_estn_en_peligro_de_extincin_en_honduras.pdfIn PDF document text
    • http://roniwixanedif.epizy.com/zisixepekig.pdfIn PDF document text
    • http://patesosiw.epizy.com/47633323872.pdfIn PDF document text
    • http://gisaxuzarufol.epizy.com/voxure.pdfIn PDF document text
    • http://rifukaleriduji.rf.gd/whos_peoples_sexiest_man_alive_2020.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_off0000bacf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBACF 5092 bytes
SHA-256: 819462c09b523805f84647336fcc2928bee5d99134ba1ba7b1501b2ad3dd268f
font_01_sfnt_off0000cc0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC0A 12912 bytes
SHA-256: d44db38e64e82f5afbfa61b84ec4a31eefdc71f6bcd9a60fb70079b2755ba40b

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