Malicious PDF — malware analysis report

Static analysis result for SHA-256 a668c36a52700f01…

MALICIOUS

PDF

71.7 KB Created: 2021-06-06 16:52:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 9459adc62679b4e59643f4c57b64eb2d SHA-1: 587baed3714eee9d0e3d4d71452b4c6be6a90deb SHA-256: a668c36a52700f0101763b1ff680e44ac40cb535f05d7f7550690b37f3c55fb1
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URIs, with a primary suspicious URL pointing to 'allytemp.ru', suggesting a phishing or malware distribution lure. The PDF structure and embedded links indicate it's designed to redirect users to external, potentially harmful, content.

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://allytemp.ru/pbw?utm_term=is+fnaf+world+coming+to+mobile PDF link annotation
    • https://vamowupa.weebly.com/uploads/1/3/4/4/134435661/c1e5f91d37deb7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451350/normal_60506aa57d061.pdfIn PDF document text
    • https://gonuzefokuko.weebly.com/uploads/1/3/4/1/134109069/4224925.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489734/normal_60204d58d9d16.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476780/normal_60008f41c9e90.pdfIn PDF document text
    • https://zedodunojoponex.weebly.com/uploads/1/3/6/0/136083391/3564422.pdfIn PDF document text
    • https://wadezadoli.weebly.com/uploads/1/3/0/9/130970015/dekomedunafetofati.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379722/normal_604bac62c3d71.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ronuzexem.pbworks.com/w/file/fetch/144428010/como_dar_robux_en_roblox_a_amigos.pdfIn PDF document text
    • http://bowawesup.pbworks.com/f/tadudewa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eedf298d-80ae-48cb-80e4-8bdfd8dafa51/free_printable_worksheets_on_direct_and_indirect_speech_for_grade_6.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4edede6b-2140-42bb-95d8-d1ca698a1820/gujunat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89e6559f-9a47-4fb9-8e74-99b4802aa6c3/wind_turbine_advantages_and_disadvantages_gcse.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f29393b-1914-4a51-a9af-bf748ba96095/52129962927.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bde59ba2-f49d-4da6-82ec-9275a43f89ca/the_emotionally_healthy_woman_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3796945-614a-4362-86dd-57b9c691f0bc/rurewuresu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e494ffd-682c-490e-94e8-31cbf85de4dd/83413712249.pdfIn PDF document text
    • http://guronavageba.pbworks.com/w/file/fetch/144498570/how_to_get_a_class_c_drivers_license_in_illinois.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 8

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_off0000d8ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8FF 5508 bytes
SHA-256: 51235c9d630ddd41d07b903159514a0819984c14e7d9096c4da92679e8021f70
font_01_sfnt_off0000ebbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBBB 11024 bytes
SHA-256: e861717362cd7b82c76beb4fb03e42c959c663ccd52123714afcf507acf0f1a4

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