Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b27d6030129c32c…

MALICIOUS

PDF

77.3 KB Created: 2021-02-26 13:50:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: dccf3c677630786e9a51eeba12f6370e SHA-1: 38eceee5f0ef943c9c02a2e4acd8cb2f82a2c686 SHA-256: 7b27d6030129c32c4fe645d7c0f02469f2445d2d3e7d5ad85ffa5d09fcecbe2d
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://crophysi.ru/wix?keyword=androdumpper+apk+download+for+ios PDF link annotation
    • http://roman-holidays.shop/51052507352gc4xw.pdfIn PDF document text
    • https://munerojepoges.weebly.com/uploads/1/3/4/0/134042508/nodin.pdfIn PDF document text
    • https://fefugenaxidoseb.weebly.com/uploads/1/3/1/3/131380158/7495524.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409113/normal_5fdc88246a2cf.pdfIn PDF document text
    • https://raguwagoneneza.weebly.com/uploads/1/3/1/3/131384547/duwejuros_sopavewitenet.pdfIn PDF document text
    • http://rubewox.sportsontheweb.net/lorinufuwe.pdfIn PDF document text
    • http://anarchymedya.com/children_s_nursery_rhymesvdpp0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421341/normal_5fd19973d94e4.pdfIn PDF document text
    • http://oneplusonemain.xyz/petujumaxafegerotzriar.pdfIn PDF document text
    • https://basedupapopulow.weebly.com/uploads/1/3/4/3/134344364/b9c1075e35.pdfIn PDF document text
    • http://fujigukatujewu.medianewsonline.com/city_of_madison_waste_drop_off_badger_road.pdfIn PDF document text
    • http://roxelejabojafe.scienceontheweb.net/my_smoke_detector_keeps_beeping_three_times.pdfIn PDF document text
    • http://nenonazuf.scienceontheweb.net/introduction_to_linear_regression_analysis_5th_edition_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402501/normal_5feb780af1270.pdfIn PDF document text
    • http://egosikenclub.com/86901397240133ly.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485591/normal_60129fdbcf6f1.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/suzujewa/akhiyon_ko_rehne_de_song.pdfIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/today_s_assam_tribune_newspaper.pdfIn PDF document text
    • https://s3.amazonaws.com/dekogamik/kizufebesovevikozunename.pdfIn PDF document text
    • http://pabewuvuxaf.onlinewebshop.net/how_to_make_vinyl_decals_with_cricut_expression.pdfIn PDF document text
    • http://bumurulepowele.myartsonline.com/644628708.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e68d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE68D 5136 bytes
SHA-256: 115eb90204bba9e98fffeb6a3c3d09608539740f41c097aa9e9ca8982422ee4c
font_01_sfnt_off0000f7f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7F2 9860 bytes
SHA-256: fbb11bbf47f23b42fe399d43a8b65d32dbf96ac69a3acd5b6faab48891da64b1
font_02_sfnt_off000119c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119C1 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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