Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ed1f2f27d0ad62c…

MALICIOUS

PDF

77.3 KB Created: 2021-03-03 23:02:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 311a2c5e9c5c659ab4dc5fe82e223599 SHA-1: 9b6dbc89d1ffef2c427f1bbb3a14a8a7fe5b66ed SHA-256: 1ed1f2f27d0ad62c327058636aeffea0e568ae6dd8f1ce4f37ff0737c55cefde
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with several pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly 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://soxebez.ru/wix?keyword=trapping+rain+water PDF link annotation
    • http://zajiledafalam.getenjoyment.net/40398192438.pdfIn PDF document text
    • http://sawemawe.mywebcommunity.org/xewuji.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385021/normal_5fda560891718.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446942/normal_5ffb215b599f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471723/normal_601b5bd97da97.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487927/normal_5fe5798d3aa92.pdfIn PDF document text
    • https://zegazofegu.weebly.com/uploads/1/3/5/2/135296009/puxurezal.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410201/normal_601ee3f072dd6.pdfIn PDF document text
    • https://cdn.sqhk.co/riragimi/he6Lmhc/big_bang_theory_definition_physics.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388421/normal_5fe153dd66f03.pdfIn PDF document text
    • https://cdn.sqhk.co/sijiposago/jhjaieh/92037945737.pdfIn PDF document text
    • https://cdn.sqhk.co/fuxuduxexi/jbnoAge/final_fantasy_xv_pocket_edition_pc_full_download.pdfIn PDF document text
    • http://siwosupegejolop.medianewsonline.com/86069469023.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/popilo/delonghi_magnifica_s_descale_light_flashing.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_off0000f350.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF350 4816 bytes
SHA-256: 912ff90027befed2fdd84e6bdd38c3f340f0771e0f68d1721fb62e4c69c8cc1c
font_01_sfnt_off000103d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103D1 10704 bytes
SHA-256: d232760c198c716911326fe861ec2299424a806d42487819be120f1531585fd5

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