Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea79d7ae8bcc9858…

MALICIOUS

PDF

73.4 KB Created: 2021-02-19 20:38:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: ff4cc51d633215f61bd391e45ac55df4 SHA-1: a0aa60ce31481495790e7246fc3ab4bc01416029 SHA-256: ea79d7ae8bcc98580759e491f5528575d7ddb8e3d56224d688c832c9c2648997
166 Risk Score

Malware Insights

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

This PDF file contains numerous embedded links, many of which point to suspicious or disposable domains. The 'PDF_SUSPICIOUS_LINK_LURE' heuristic indicates that these links are intentionally made invisible to trick users into clicking them. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the primary attack pattern involves social engineering through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://jacksth.ru/wix?keyword=daily+appointment+book+2020 PDF link annotation
    • http://freefire-gifts.com/connect_canon_printer_mg3520_to_wifi8wqwp.pdfIn PDF document text
    • http://zavemobavozake.22web.org/radem.pdfIn PDF document text
    • https://cdn.sqhk.co/kigaratak/bgjQgcW/93481956518.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481663/normal_5fcd62cdacc9d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403805/normal_5fe161a8def32.pdfIn PDF document text
    • http://gramnews.xyz/can_you_sort_by_fill_color_in_excelq5o7x.pdfIn PDF document text
    • http://optamorem.com/elimination_using_addition_and_subtraction_worksheetq65c6.pdfIn PDF document text
    • http://managerprogram.live/sinhala_cartoon_films_mp4zx4wf.pdfIn PDF document text
    • https://cdn.sqhk.co/wefonasifaza/CDhbsWs/37865600651.pdfIn PDF document text
    • https://cdn.sqhk.co/manowipete/gghaKPq/track_racing_online_pursuit_unblocked.pdfIn PDF document text
    • http://trells.space/11249062576yb9wn.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424935/normal_5ffdf4beec8e0.pdfIn PDF document text
    • http://winoraama.space/lagejaluve5l5uz.pdfIn PDF document text
    • http://fulusixavopowem.iblogger.org/36527940969.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389127/normal_6015845f40899.pdfIn PDF document text
    • https://cdn.sqhk.co/zuxafopagad/diiKeic/51793627412.pdfIn PDF document text
    • https://cdn.sqhk.co/lapefuxolu/WjeoOjS/26406825782.pdfIn PDF document text
    • http://begemotiks.space/demagagirekineralusogq6oqk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454301/normal_60289579651b2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392439/normal_600655d1e6410.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369775/normal_601be37dd1339.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e2d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2D0 5268 bytes
SHA-256: 850798a232610b97e26834bc8a9516a4cc42e5622a1a04d8c65bd2ad6c60406e
font_01_sfnt_off0000f4bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4BD 10312 bytes
SHA-256: c9a46a0dcb547c4f18bf5a4528c7cdfff979549d7e7cbd17846c03a29a4a9279

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