Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee01c806d959554a…

MALICIOUS

PDF

77.1 KB Created: 2021-05-13 09:12:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 1de93910aeb13ffb40da71b6a3e015f2 SHA-1: ebf9edf27c250dbca441cba289afac349726ed80 SHA-256: ee01c806d959554a34c0a0ddb06ad29e173b4062907cc349d8ea653ce4ae97ee
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://golowaki.ru/strik?utm_term=fisher+%2526+paykel+dish+drawer+fault+f1 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4390637/normal_603a6fe10aaa4.pdfIn PDF document text
    • https://cdn.sqhk.co/vuwonesi/idjiXhg/64048898737.pdfIn PDF document text
    • https://cdn.sqhk.co/zidodovare/iGRjjsH/peggle_blast_cheats.pdfIn PDF document text
    • https://cdn.sqhk.co/dinigivo/gpgggih/ikea_day_bed_fitted_sheets.pdfIn PDF document text
    • https://cdn.sqhk.co/poladejug/KvhdTjd/movie_download_manager_for_windows_7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421049/normal_5fed970d96b92.pdfIn PDF document text
    • https://cdn.sqhk.co/manuguwe/hbgj4tv/69755211251.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487413/normal_605bbe5f2cfe3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421330/normal_5ff28197c875a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a32e93c2-1aa3-4149-af29-aa5d163ab988.filesusr.com/ugd/40336e_7e62c4363d114f23b0c3154ce00931f7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2629b6e-0ee2-4e13-9910-02034af2e8ce/how_to_take_apart_buddy_heater.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c321084a-6cb1-46f0-9019-40d9389290fd/98701054757.pdfIn PDF document text
    • https://f84ffea9-2755-49c2-9cb5-47ca8b55fe65.filesusr.com/ugd/0adedf_cf1559aca2ca4fb99dbee829ed24f5b6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/19dbee43-0b5b-48da-9545-d802894d1109/the_storyteller_jodi_picoult.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d82de84-cb77-4236-90e6-b93ed2cd5540/non_emergency_police_number_omaha.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56edf089-f868-489c-b889-30995119a8d4/how_to_use_dremel_attachments.pdfIn PDF document text
    • https://f1ddcea9-c323-452c-a4d3-aaefec61e50a.filesusr.com/ugd/defd8a_24c29b21f30b46aa8c92afc4392e4447.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba6a1f23-cfb6-40a3-8db6-9723d8a64a16/1584809600.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c240d29-7a50-4e50-b9a1-08f3ff45906b/highway_traffic_safety_act_saskatchewan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b37df12c-3e9e-45dc-af1f-5af72a7f2bf8/how_to_program_xfinity_xr2_remote_to_sony_tv.pdfIn PDF document text
    • https://6f1239e7-da96-47bf-8adb-22d47a96a9da.filesusr.com/ugd/bb5a15_f0b243414f234e14b20ab8e62d07a266.pdf?index=trueIn PDF document text
    • https://6d4cd3b7-91e9-43ac-92b9-205473f1e50d.filesusr.com/ugd/28146e_fede308ecc024599a743c332a0f86555.pdf?index=trueIn PDF document text
    • https://92ddf5cc-4ce7-4caf-b117-8241c553a727.filesusr.com/ugd/42bae0_66568e2f293d4b10855aab82f4cc5927.pdf?index=trueIn PDF document text
    • https://ff9dba89-6132-4485-99c2-ace8a2453124.filesusr.com/ugd/c3f59f_1d78cae82aea4c4f86b9bfa88a9bc449.pdf?index=trueIn 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_off0000ef6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF6E 4480 bytes
SHA-256: 69d4b6f9b0d273a7077e652a206e0090c7c0d8a69f663c6f8ebcfeca0d545428
font_01_sfnt_off0000fe9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE9A 12052 bytes
SHA-256: 34a6f231b65f7f230c78a32988be5f01cdb2e427c20353f73a50665035984703