Malicious PDF — malware analysis report

Static analysis result for SHA-256 c17f82223b5548f2…

MALICIOUS

PDF

75.6 KB Created: 2021-03-29 05:38:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c9d420b8ccafff4ab20254411e3f8afe SHA-1: 8ad797cb324b9b2af30c33dc45679388d08a9f5d SHA-256: c17f82223b5548f262c4cc326c6b87f4d768d3da870c522b6decfbec04046002
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 0.9997

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://leonvi.ru/wix?keyword=best+tripod+for+canon+rebel+t5i PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4493195/normal_6032af5fae3d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467910/normal_60270f334b7fc.pdfIn PDF document text
    • http://ilkertr.shop/crochet_pattern_for_super_chunky_woolwk6by.pdfIn PDF document text
    • http://songkfrk.site/62126244336dek9b.pdfIn PDF document text
    • http://draiwenstore.online/fall_guys_game_ps4zlbzq.pdfIn PDF document text
    • http://varietystore.website/xopuvudaxabuloke5ece3.pdfIn PDF document text
    • http://nonretloli.site/48503955492paokc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413563/normal_60020f73a3fcf.pdfIn PDF document text
    • http://clientesdkb.com/slither.io_apk_mod_androide5tu1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fbfff70-d124-4f73-b042-a6eecee7a244/mujilejutoliwo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aabeb74b-a823-437a-80f1-1c76a5b5949a/tipukuxemidapixasil.pdfIn PDF document text
    • https://0dc5016f-38c0-4e11-84f4-4717e3ef4ec7.filesusr.com/ugd/4fd84c_7b71c190483b4420baa63e75081f9f71.pdf?index=trueIn PDF document text
    • https://ca108e69-7b6b-43f0-8f16-d96ebeb8a33d.filesusr.com/ugd/79e0dc_27ecb74e2017442c931e5e9b8b071fa5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e3d8a39-618d-43d5-8fda-5d308948335e/kezia_noble_login.pdfIn PDF document text
    • https://s3.amazonaws.com/lopeteb/luwevuvumefeliz.pdfIn PDF document text
    • https://s3.amazonaws.com/dudujopixejikug/kenem.pdfIn PDF document text
    • https://801a9f91-e12c-4b3a-b535-42c3eaff61c8.filesusr.com/ugd/d237ef_d46f09fb76be4e5d8e95987e2b109ca9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sezewu/warlock_leveling_guide_dnd_5e.pdfIn PDF document text
    • https://s3.amazonaws.com/midaguvimabof/kevajokugekof.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaporam/cambridge_igcse_physics_workbook_answers.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

Related samples 5

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e938.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE938 5464 bytes
SHA-256: a6c969156479872f5551bda25c2aead18427cce05b3ebc93246cf336f4ad595b
font_01_sfnt_off0000fbdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBDB 10880 bytes
SHA-256: fb19079a288e882b5151c8392450dcb86d7fa4edba53d4f7e6613463d0c2368a

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