Malicious PDF — malware analysis report

Static analysis result for SHA-256 859ba27af9fc6cfd…

MALICIOUS

PDF

106.8 KB Created: 2021-03-23 15:11:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 74e83cabb549007e82a3315f844d0d28 SHA-1: 9d138528c29b26f1f9d008ce0da8ac13472899ba SHA-256: 859ba27af9fc6cfda3afb223e1f15b59b454db1421380c4a3d905c3ed23d2043
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://jumiwimov.ru/aws?utm_term=what+is+the+most+valuable+star+wars+collectible PDF link annotation
    • http://tebapewulodafe.getenjoyment.net/what_did_the_third_estate_include.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453342/normal_5fe16fdbe2027.pdfIn PDF document text
    • http://sutarakikim.scienceontheweb.net/which_kitchenaid_mixer_is_better_for_bread.pdfIn PDF document text
    • http://drovazvenigorod.ru/nesewagowomizokizamok4jcyh.pdfIn PDF document text
    • http://wivevemeb.scienceontheweb.net/zopamitiloriwifudamizo.pdfIn PDF document text
    • http://jewlgems.com/how_often_should_you_do_glute_activation_exercisestusik.pdfIn PDF document text
    • http://pedalini.club/418555341896hj3z.pdfIn PDF document text
    • http://zutolewe.mywebcommunity.org/64382771593.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382429/normal_604ddf45cf78f.pdfIn PDF document text
    • http://help-bluebadgecenter.com/45690330298px8b9.pdfIn PDF document text
    • http://it50discount.pro/texas_algebra_1_textbook_mcgraw_hill83b76.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/8ef7088b-e703-4498-a41a-112195a08fbd/taviporixukavojixi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01ffe9c9-f60f-4536-aa68-ec9474573ba4/lameti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39649b00-06ea-4dee-a3f5-a2a9fb21531e/how_to_clean_cast_iron_waffle_machine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4da91acc-9d1a-4ad4-9c02-11b51582c395/what_is_the_tradition_of_christianity.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2600a658-5927-42e6-b5f3-ec009dd73c2f/19426811370.pdfIn PDF document text
    • http://fuxumapumumubif.rf.gd/mezinawovimawabavewovu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83d0b366-cfbb-4ec0-9d03-95b29a6b7622/nenuta.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb4a43a3-3b2f-4c02-a6bb-7759099dfffd/72341255820.pdfIn PDF document text
    • http://kojexeruxub.epizy.com/cognos_active_report_filter.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_off00016124.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16124 5344 bytes
SHA-256: 30e2bb452e1243f95007c4796df473e1ff27bec4b456a4a95a8e6b6c489a2442
font_01_sfnt_off0001733f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1733F 11844 bytes
SHA-256: 2a77337cb73ad3f0b4b15f33d2e8c72c80c94a026a5eb0da9903151b82a18ea8

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