Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0e7257e7230b5e7…

MALICIOUS

PDF

106.1 KB Created: 2021-04-02 16:41:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 710851a45aa832c75e690112242a71f8 SHA-1: e8aae4bcd2995b936571a11cdfb4abd6e51c15ad SHA-256: b0e7257e7230b5e7a63f1a52d5dc89bd57e182eb306b45ef01ef6aea900b787a
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 0.9992

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://kuzutuzo.ru/strik?utm_term=pak+navy+technical+jobs+2019 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4475383/normal_603de68d613b0.pdfIn PDF document text
    • https://solawelosadi.weebly.com/uploads/1/3/1/8/131857655/9046608.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402940/normal_605186b69d190.pdfIn PDF document text
    • https://viwexiwi.weebly.com/uploads/1/3/5/3/135318047/lemunape.pdfIn PDF document text
    • https://tilavulam.weebly.com/uploads/1/3/0/7/130739056/717268.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496193/normal_5ff445c14744e.pdfIn PDF document text
    • https://jesetopag.weebly.com/uploads/1/3/4/6/134632795/9637010.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373776/normal_606010c52517c.pdfIn PDF document text
    • http://bavimobuxadu.medianewsonline.com/feral_tiefling_5e.pdfIn PDF document text
    • http://buytoday.cc/what_is_starbucks_handcrafted_refreshers_beverage8nh6a.pdfIn PDF document text
    • http://lisolu.org/vemitufufutefufugaxisekitfhnnm.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/dovulavavo/rijoxigomuwasoforure.pdfIn PDF document text
    • https://s3.amazonaws.com/jidagafinuxesu/sky_email_extractor_free.pdfIn PDF document text
    • http://nufiwimuzobo.onlinewebshop.net/majuwozok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61ecdf72-bc50-4ae1-9175-5684fa620bf1/what_is_a_social_rehabilitation_facility.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58fe65ad-d1da-4496-9f74-1db6301af35e/what_are_management_control_systems.pdfIn PDF document text
    • http://xarilupinedup.myartsonline.com/fizifoxibuno.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e574508-15f9-44f6-a5b4-8e84bac8c2b8/laxomilomoxene.pdfIn PDF document text
    • http://fajenadiwizowo.atwebpages.com/bsc_1st_year_chemistry_syllabus_download.pdfIn PDF document text
    • https://s3.amazonaws.com/nunakixuma/96039923811.pdfIn PDF document text
    • https://s3.amazonaws.com/fopalew/31455468237.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013d94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D94 5504 bytes
SHA-256: 527086437a4ceca41d99f77a32946c7b96fdd405d3f8b3086b4cf83582044fdf
font_01_sfnt_off00015048.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15048 11356 bytes
SHA-256: 335e9d506ed16f903113ec69f9b959c4bb70be9dde1af443b465ddcb2417792d
font_02_sfnt_off0001774d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1774D 16204 bytes
SHA-256: 541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501
font_03_sfnt_off00018c7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18C7B 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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