Malicious PDF — malware analysis report

Static analysis result for SHA-256 a74e8f9caca401f1…

MALICIOUS

PDF

80.3 KB Created: 2021-05-04 00:00:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 25058dbffecc2e75f0757c6fbea8c1ab SHA-1: 5a401808a47087ce0e7ef0009b86d992e006ac69 SHA-256: a74e8f9caca401f1f770735f449046c1948ae1526300d39a96c2eec550a339e3
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://soxebez.ru/strik?utm_term=samsung+gt-p3113+tablet+specs PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4465000/normal_6016de4326c72.pdfIn PDF document text
    • https://bumogekatagod.weebly.com/uploads/1/3/0/7/130776321/9512944.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415052/normal_5ff0df0293083.pdfIn PDF document text
    • https://benukozememig.weebly.com/uploads/1/3/4/4/134480731/3c564ddd4f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370273/normal_6063c7c219935.pdfIn PDF document text
    • http://mokaxizekebade.scienceontheweb.net/65593290136.pdfIn PDF document text
    • https://rorogujelid.weebly.com/uploads/1/3/4/7/134702732/eca651246284e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404723/normal_5fcb0f30bf45b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418175/normal_6064e688c6ce1.pdfIn PDF document text
    • http://kosamaritaj.getenjoyment.net/weight_loss_diet_menu.pdfIn PDF document text
    • http://pemowovamig.iblogger.org/wildgame_innovations_insite_cell_wifi_password.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ragoziminazu.epizy.com/60635450800.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b256bcb6-87b2-4919-ad62-705eb86008ad/vicks_vaporub_patches_walgreens.pdfIn PDF document text
    • http://guxenubegipus.epizy.com/interior_design_career_salary.pdfIn PDF document text
    • http://jinagafudolugil.epizy.com/what_is_the_maximum_oasdi_withholding_for_2020.pdfIn PDF document text
    • http://wuliwopiveti.rf.gd/49210175746.pdfIn PDF document text
    • http://jawuguv.epizy.com/talelulugewunowizolej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2663f3a7-f75c-42a4-b82a-8963dbccebfa/kenirazekapufafefug.pdfIn PDF document text
    • http://kofipazefoleris.epizy.com/zakakazug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22b23715-0aa4-422f-a511-28641cd304e5/restatement_second_of_torts_negligence_per_se.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_off0000ef6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF6D 5648 bytes
SHA-256: 6790dd18b7569306dae8b20f0db441ea966e8a4fefb14b6011296ccda233266e
font_01_sfnt_off0001029d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1029D 21872 bytes
SHA-256: 5c0c36610e21c4e3d3cb66f4df6dc4b03876dc1496adb6fd271b3898be63047b

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