Malicious PDF — malware analysis report

Static analysis result for SHA-256 c32380eb046173d4…

MALICIOUS

PDF

84.7 KB Created: 2021-03-10 20:46:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 1f8cba3569a9614f267929d93806a34d SHA-1: 6b5a4f314a7ac155c158956f49b763e5ba3c8724 SHA-256: c32380eb046173d4cdecdb6c089de58bbb23ca82a56d121657e1f36422d8c0f3
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 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 0.9998

Heuristics 5

  • 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://resalured.ru/strik?utm_term=how+to+pair+beats+by+dre+powerbeats+pro PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4386829/normal_5fdb5b84e0304.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457014/normal_603f8f6b513ef.pdfIn PDF document text
    • http://zekifafeter.scienceontheweb.net/top_ice_fishing_lures_for_trout.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493245/normal_602d40df6e04b.pdfIn PDF document text
    • http://wuwubaga.22web.org/33111280701.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461509/normal_6025bae0c6593.pdfIn PDF document text
    • http://sugegixojavuro.iblogger.org/honeywell_radiator_heater_parts.pdfIn PDF document text
    • http://xiruzox.mygamesonline.org/how_to_use_beurer_wrist_blood_pressure_monitor.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://s3.amazonaws.com/pugomonapoxuxe/darth_vader_face_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec353c79-3737-49c5-b9b9-298fdfa5170e/kurzweil_pc88_specifications.pdfIn PDF document text
    • https://0dea665b-aaaa-42f3-a52c-f86f0fd1efa2.filesusr.com/ugd/8b9728_102623f6653e400eaeb3e1fb6e5398a6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ac3de2d-2135-4edb-a476-f2a0276450b6/judib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86b2534a-2426-4eae-a3f1-c28a729b55b8/73509777164.pdfIn PDF document text
    • http://gasukexopesifu.epizy.com/brooklyn_nine_nine_season_1_yify.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02128182-b894-4734-bb68-586fe6c0d4a7/vusawupabuda.pdfIn PDF document text
    • https://46c19374-600d-43be-a5f2-d8bf07c6fddf.filesusr.com/ugd/cc94a4_b821df96c0d74e378137ce4f641b484a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vovabagubajegeb/67411891229.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6732552-a661-4d2b-a025-68f252932bcf/unearthed_arcana_feats_for_races.pdfIn PDF document text
    • https://84daacc9-7e90-4c5d-b1ed-526950900c49.filesusr.com/ugd/73f3b0_fb659210fc334e3592ff0eb470a6b2f4.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010062.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10062 4896 bytes
SHA-256: 5a366d9f1695688e2c140fbecf8d2ae2b6cbdfb43e3cec67c954c830fdebf2f8
font_01_sfnt_off00011121.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11121 11068 bytes
SHA-256: 10a3298e17bf1fec218bc14858530ff332d9c0ec726a66b146d318a2173f736f
font_02_sfnt_off00013710.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13710 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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