Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad4d0241b492fa27…

MALICIOUS

PDF

77.6 KB Created: 2021-04-25 09:53:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: e5f57614be57758cfc44c3af695dfba3 SHA-1: 270499fbc1f5e53233ca67d58b6ea044a6917e45 SHA-256: ad4d0241b492fa273557f03dc65652ff16c2e6aa3dca8e8a0a8664f9748848e6
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with one specifically identified as a lure related to a search query. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for multiple links, suggesting a phishing or scam operation. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://pelibifir.ru/strik?utm_term=how+much+does+orange+chicken+cost+at+panda+express PDF link annotation
    • http://vovality.club/jibunumozupapay84wb.pdfIn PDF document text
    • http://thecabinets.xyz/tizoxidodicgjgw.pdfIn PDF document text
    • http://kupiokno.su/raguluxibogh5u0.pdfIn PDF document text
    • https://cdn.sqhk.co/rasetiwulipu/hifnvgs/server_tnt_run_minecraft_bedrock.pdfIn PDF document text
    • https://cdn.sqhk.co/sigidezok/BlihQpM/first_time_pregnancy_advice_in_tamil.pdfIn PDF document text
    • http://business-open.online/jozabuvojekewozujlxz6f.pdfIn PDF document text
    • http://fartook.online/beginners_guide_to_workout_supplements6y825.pdfIn PDF document text
    • https://cdn.sqhk.co/jutigurotow/chiig1M/scientific_poster_design_templates_powerpoint.pdfIn PDF document text
    • https://cdn.sqhk.co/xanovika/hjcNzje/buvakoseja.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/hbibhgc/87528995614.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c6de0af5-2a4c-46da-924c-839bccb102c6.filesusr.com/ugd/5f1f0f_2fc6f912d4224e3b9084b8982b13bad8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/db0f9367-d51f-4a7f-908d-e5614cc3240a/eureka_the_boss_smart_vac_belt_4870.pdfIn PDF document text
    • https://43466d02-873c-4564-b63c-f2f79aa6d38e.filesusr.com/ugd/fd64e8_dd62cc6c9d064ff1968d05463febbe01.pdf?index=trueIn PDF document text
    • https://bf6af823-cb0d-4ee8-9d5b-4f0b1de5ed24.filesusr.com/ugd/9eb187_296446f768284d4987f24bd54005b202.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c407628-b61d-4f85-9852-c109d67cbf16/fifty_shades_darker_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e25f31b1-3c05-4178-acf8-6173f1c8d004/me_gozar_en_tu_presencia_jehov_versiculo.pdfIn PDF document text
    • https://s3.amazonaws.com/xunilukegez/67073121584.pdfIn PDF document text
    • https://s3.amazonaws.com/bifadiwuwileji/meloxexafuvolozuduk.pdfIn PDF document text
    • https://acd80754-3b70-42c6-a60f-3489f6261da4.filesusr.com/ugd/f1780b_9012f3c663ab48509c7ab39fa2fbe7ce.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe8b9033-3d50-42fe-b80a-cdd6d002f7c3/what_to_use_to_clean_glass_cooktop.pdfIn PDF document text
    • https://s3.amazonaws.com/winumigutam/the_one_kiera_cass_summary.pdfIn PDF document text
    • https://a121017b-3fb3-450c-9156-48dd71a9bf80.filesusr.com/ugd/07625c_1957bb41f6f2486582aefbc69da0eede.pdf?index=trueIn PDF document text
    • https://39c3e2ba-dcb8-4bc0-9ed7-0058f02c59d5.filesusr.com/ugd/fd4c29_3df012a6050b4bdab9c5f599c66c3579.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zafijukopa/bucoliche_traduzione.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_off0000efd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFD5 5640 bytes
SHA-256: 595e6b712637127506797587670094392853ed482427a09f8c53f30957382562
font_01_sfnt_off000102f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102F3 11248 bytes
SHA-256: 54c1a39e3dd558723f2c79b881a02eb307f3c1b9eb9a42bda3516ef721ab9842