Malicious PDF — malware analysis report

Static analysis result for SHA-256 883a124349efb74f…

MALICIOUS

PDF

73.6 KB Created: 2021-03-24 08:30:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 26dc4ccbd2049fa3e90b85d77e982488 SHA-1: 8aad9d2a2f36b1e9a0f442673c68463472242993 SHA-256: 883a124349efb74f7b2bedd5c26ccd7eb6238ed2c8fe963349636a7a2e96cf05
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://mezovuduw.ru/strik?utm_term=when+peace+like+a+river+hymn+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4403129/normal_604ca35c6614f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366351/normal_601386b8b8bfe.pdfIn PDF document text
    • https://cdn.sqhk.co/nububufi/fhggcAI/34896186053.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460263/normal_5fe0ff1c61278.pdfIn PDF document text
    • http://dibosezufo.getenjoyment.net/elements_of_story_writing_ppt.pdfIn PDF document text
    • http://fullpisetc.ru/korumoeo24m.pdfIn PDF document text
    • https://cdn.sqhk.co/dajebala/0jfghhj/mayhem_ninja_ninja_vs_zombies.pdfIn PDF document text
    • http://prequester.online/what_is_a1c_range_for_diabetesgf2vc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459029/normal_5fc6b4990f361.pdfIn PDF document text
    • https://cdn.sqhk.co/gewewoturila/gdSljjl/neon_live_wallpaper_for_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/linidivez/Xhjijt2/bmw_car_wallpaper_hd_4k.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407733/normal_5fffe4391ba71.pdfIn PDF document text
    • https://cdn.sqhk.co/kisereta/ihhjjDi/20790885838.pdfIn PDF document text
    • http://lamakexo.scienceontheweb.net/international_4300_turbo_actuator.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/27cc07d2-0617-43d5-8333-38baa8139409/what_is_the_range_of_a_tesla.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83e62d3f-b91e-4b0f-a37a-6479f2bcb3fe/the_fire_next_time_quotes_analysis.pdfIn PDF document text
    • http://suxazetevuzo.onlinewebshop.net/35464935483.pdfIn PDF document text
    • https://27475d5a-2981-497d-8cd5-0c310ef10f8b.filesusr.com/ugd/9cb927_488f3bbd0c2847d28537156c46d58c5c.pdf?index=trueIn PDF document text
    • https://12c48f50-3553-44c7-a31c-19fc5df83d07.filesusr.com/ugd/7e0eb0_5e5fbf0300c044a1ac8e70d86bb458df.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/223173af-e6ae-4e8a-abca-2ba0984e0c67/nojom.pdfIn PDF document text
    • http://miwewugewu.atwebpages.com/garmin_map_60csx_manual.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d414.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD414 5172 bytes
SHA-256: 16317699bc72865106f76e0495a0dd3d77241543e70169a395c147a5ee5e161b
font_01_sfnt_off0000e580.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE580 10872 bytes
SHA-256: d4d9f1eda3fccf780a2d20b766f3d2f3bdd0667397ba3005424f98f212404546
font_02_sfnt_off00010aad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AAD 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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