Malicious PDF — malware analysis report

Static analysis result for SHA-256 be566c0ca777c007…

MALICIOUS

PDF

72.2 KB Created: 2021-03-12 09:36:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 9b33fc39f79ae3306a487cec541cab6d SHA-1: 5b901f89df43e58385ddcb77732de96709e731df SHA-256: be566c0ca777c0078d1e24c1344ac3df8099b332b41e73442d0c816b2e9d7ce0
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 0.9998

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://resalured.ru/award?keyword=analysing+english+sentences+pdf PDF link annotation
    • http://jojidasusesot.sportsontheweb.net/how_do_i_reprogram_my_magnavox_remote.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484995/normal_601ac465a8fc9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427523/normal_602dd5c390f96.pdfIn PDF document text
    • http://baxusajatos.sportsontheweb.net/36805379713.pdfIn PDF document text
    • http://tevaruv.sportsontheweb.net/tom_clancys_rainbow_six_vegas_2_ps3_review.pdfIn PDF document text
    • http://nakotigolajeg.scienceontheweb.net/craftsman_tiller_carburetor_adjustment.pdfIn PDF document text
    • http://mamubisuk.mypressonline.com/finale_becca_fitzpatrick_wikipedia.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419650/normal_5fda42c77d5a4.pdfIn PDF document text
    • http://sevowina.medianewsonline.com/soundbot_sb571_battery_buy.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/6aca9e39-5a44-4c9b-a4bb-f32093ef1267/equality_and_diversity_statement_for_job_application.pdfIn PDF document text
    • https://e966359d-176b-477a-9ad9-c314bea94227.filesusr.com/ugd/fa6f14_62e395527f4b42e5ad69d37d15c52a4f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8dc0968b-cf24-4f31-9d66-2117982e9837/which_is_the_best_robot_vacuum_cleaner_to_buy.pdfIn PDF document text
    • https://bf68d742-fb98-404a-ab47-1dcf24f7df52.filesusr.com/ugd/83e7fd_33e304743327467484b63fcf784f4f28.pdf?index=trueIn PDF document text
    • https://9f5bcc56-a059-4f00-ae85-604acd6a3d2d.filesusr.com/ugd/ac9354_5f02ae9183bf4abc91262b7ae989818b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a1adeb5-0d01-413c-bb63-4cf8729223c2/how_much_is_bobbi_kristina_brown_worth.pdfIn PDF document text
    • https://e824aeac-d22a-4b45-bb3c-17051d6ee04f.filesusr.com/ugd/de60da_f79d64c886c040899233fa93029372cc.pdf?index=trueIn PDF document text
    • https://c36efdde-2309-4ce2-a10d-b6df2ce12cd8.filesusr.com/ugd/e98059_8125ebceb062413caf6fb99f80348a5e.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dddd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDDD 5412 bytes
SHA-256: 34a55d405fdc5a53f6d9447c2ae5ebf02d637463501f148c3a6dd3945884c040
font_01_sfnt_off0000f054.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF054 10468 bytes
SHA-256: e598c182422f3c42c23341474250072123bf0d6c4996831a1d1fd97f6ebb88bc

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