Malicious PDF — malware analysis report

Static analysis result for SHA-256 426ef1f06daf1e0e…

MALICIOUS

PDF

76.0 KB Created: 2021-03-13 22:41:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: cc96a72f34432bd51c648272d7e065ef SHA-1: 1a1fa8a053fbbafe7bd2b74971b8edff698ab40b SHA-256: 426ef1f06daf1e0e3c9f8cfdf831a5463ba503f2558b8197d8cb6c1312c92e0f
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 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xajibur.ru/wix?keyword=aprenda+a+manejar+carro PDF link annotation
    • https://cdn.sqhk.co/xudapurofoz/iL0iAkR/7463319302.pdfIn PDF document text
    • https://semoburepov.weebly.com/uploads/1/3/2/8/132815840/8232593.pdfIn PDF document text
    • https://cdn.sqhk.co/libuzewis/ifibicT/leriwararugasalej.pdfIn PDF document text
    • http://saxobupazes.sportsontheweb.net/nejazuresolukox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365547/normal_602c57fd5262e.pdfIn PDF document text
    • https://zaxixeresez.weebly.com/uploads/1/3/1/8/131871416/9229ab.pdfIn PDF document text
    • https://cdn.sqhk.co/zarejesorufo/dhdMic4/18867388883.pdfIn PDF document text
    • https://cdn.sqhk.co/zebenane/aifKrif/31379226922.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404310/normal_6018ca848e5a3.pdfIn PDF document text
    • https://zitenimed.weebly.com/uploads/1/3/1/3/131383388/197fe2.pdfIn PDF document text
    • https://cdn.sqhk.co/ronelejibir/dOmItC7/85457633904.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381102/normal_5fd355457c7f2.pdfIn PDF document text
    • https://gepopoxano.weebly.com/uploads/1/3/4/6/134663556/81c12.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489241/normal_602edec347cc7.pdfIn PDF document text
    • https://tedumuwoke.weebly.com/uploads/1/3/1/3/131397970/motomugubalog_lidulatatedove_sokoded_fozodelunijovu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ralirajuz.atwebpages.com/casio_gw-9400-1cr_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bcdc22d7-1026-480e-a861-1d482edbbac0/18234673208.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9846aa2f-2409-4518-b1b9-94fc16e9e94f/voxunuladerolilojizojogo.pdfIn PDF document text
    • http://jelunegizubu.atwebpages.com/air_pollution_effects_on_animals.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cfaa6b2-2ed8-483f-9ce3-dad06ff8c299/vakefokiguwafebaroxewaxu.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECAC 5072 bytes
SHA-256: c41e64cb78325931edea93845e6924e65cc39cce9d2ea1a62d30807b022773e5
font_01_sfnt_off0000fddc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDDC 11008 bytes
SHA-256: d8a86a0cbb1c3b322cbcd03114c2e8a42d4e6573511708a2227d088d77c15738

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