Malicious PDF — malware analysis report

Static analysis result for SHA-256 be486ae56e7bb3cf…

MALICIOUS

PDF

77.7 KB Created: 2021-03-29 14:42:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 630d2254c829e053dfef49d527607e6a SHA-1: 186864580bbfb4b05806dd7631e7f5e3f4cb4081 SHA-256: be486ae56e7bb3cfc2928445ad99f35d8ef1447a0e7dabb8f2619c4db10c61d5
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=elite+23l+digital+air+fryer+oven PDF link annotation
    • http://autocredit.moscow/zodexemomeninibufumuw9t14.pdfIn PDF document text
    • http://copyrightsupport-ig.com/intermediate_accounting_14th_edition_solutions_manualwgmog.pdfIn PDF document text
    • http://ginalupajeriw.scienceontheweb.net/xajovanezurixusajazakulo.pdfIn PDF document text
    • https://danizejoj.weebly.com/uploads/1/3/5/9/135990884/nolugisexugoxer.pdfIn PDF document text
    • https://rexerobebaru.weebly.com/uploads/1/3/1/8/131872155/danok.pdfIn PDF document text
    • http://domsale.xyz/26696564896kra6q.pdfIn PDF document text
    • http://nesobaka3.xyz/zondervan_bible_dictionary_free_downloadg9r9c.pdfIn PDF document text
    • http://pagavopalubutu.scienceontheweb.net/do_guys_ignore_you_to_test_you.pdfIn PDF document text
    • http://mesretly.xyz/reporter_gene_assays_reviewiwt8d.pdfIn PDF document text
    • https://gawudizilox.weebly.com/uploads/1/3/5/3/135300959/f4e66e22c0a95f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ziwemasux.myartsonline.com/fogezosaravuledu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c47de02d-66ff-4c98-a8e0-45c581b316de/73792950280.pdfIn PDF document text
    • https://59bb578d-b312-442a-858b-1a1a54b18a6c.filesusr.com/ugd/c79b1c_4685632cdb174b7e948c4b047f4a8721.pdf?index=trueIn PDF document text
    • https://aa4de0c4-a7fb-47f6-97fe-5721705e71c1.filesusr.com/ugd/824332_c7aa8914c2dd4c579f94c1e17b0f5e80.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/972ceac4-810f-441a-a3ba-7e9756acadb5/buxaxilanukipenika.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6301fcf9-8d6a-4be3-b88e-1bd36308b062/gozuketugux.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_off0000f13b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF13B 5312 bytes
SHA-256: fedd89ce5e170ed9456981579fe84d297686facff51d548cf796a86e5d61f1af
font_01_sfnt_off0001036f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1036F 11372 bytes
SHA-256: 5208f5c3b844cfb70b9a9a9493afd7e0f4346eb9c81492fbefc9af2684da1927

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