Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e20c2fbfd7ba066…

MALICIOUS

PDF

85.3 KB Created: 2021-03-24 11:41:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 16161bd264c21603ae6de14d3f83590d SHA-1: 56244ce3db629905f70171fe12a0a8621f86a5ea SHA-256: 6e20c2fbfd7ba0662308eb91f380f29f0a9d209c0fc68802e9d1f8908821595e
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-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://fokemale.ru/award?keyword=english+questions+and+answers+pdf+download PDF link annotation
    • https://cdn.sqhk.co/janimivaxo/Zjdjiic/11721616766.pdfIn PDF document text
    • http://gofesirukuzud.22web.org/chiltons_repair_manual.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387036/normal_60107ffc3d732.pdfIn PDF document text
    • https://cdn.sqhk.co/fabokofe/tjhhjib/20539162893.pdfIn PDF document text
    • https://cdn.sqhk.co/tabewinudeka/ijjehc1/kick_heroine_ke_photo_download_kare.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420612/normal_5fef8abc75e6d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410006/normal_5ff2a2086360c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://2634c7da-0b58-4de1-95e3-ef2217a723ee.filesusr.com/ugd/f934bc_aecafe118d2b4acf9327c6d969aa73b4.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8bbdb9a-5ee8-4075-bbcc-2bef8521cced/how_to_fix_my_computers_audio_problem.pdfIn PDF document text
    • https://s3.amazonaws.com/vufuzewasi/land_administration_and_management.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a88c069-d12d-49b0-a3c4-a2ec3d7f0097/15709012900.pdfIn PDF document text
    • https://s3.amazonaws.com/tonemakopinibem/pidokos.pdfIn PDF document text
    • https://901c4554-6fda-40bf-8344-1f1538f5dc06.filesusr.com/ugd/a76634_7beba449d0194db2a80bbd36f85439c0.pdf?index=trueIn PDF document text
    • http://filanak.rf.gd/rubid.pdfIn PDF document text
    • http://defazuneropex.epizy.com/pdf_to_word_document_converter_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d098654-8bc5-4e8b-915b-3d12e30f294e/52434907204.pdfIn PDF document text
    • https://s3.amazonaws.com/tobojelusiwi/frigidaire_oven_repair_service_near_me.pdfIn PDF document text
    • https://s3.amazonaws.com/tobojelusiwi/clinical_practice_guideline_tocolytic_treatment_in_pregnancy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20d1d99b-f13d-4d46-a692-eff07c505e9c/taxemiwigu.pdfIn PDF document text
    • https://a2ae8793-a99f-480d-a3bc-849ef63d34f7.filesusr.com/ugd/cc207a_e7b43868872245d69dd27368fe224b1b.pdf?index=trueIn PDF document text
    • http://wegojokudevepo.rf.gd/major_american_rivers_map.pdfIn PDF document text
    • https://s3.amazonaws.com/lonozote/cinema_hd_2019_apk.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010da6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DA6 5476 bytes
SHA-256: 54be42618883f388f3b3464d4de3aab700222a7a544327c08e9ef4e41b7a3b56
font_01_sfnt_off00012050.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12050 11040 bytes
SHA-256: 8850fde6295c89217f29f0458d1429797de52e19025a0c046787a2ddeaabc649

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