Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b46964a8ab2bfca…

MALICIOUS

PDF

83.6 KB Created: 2021-04-22 05:45:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: d0c51d011f5e92784815f1875791d7ca SHA-1: e9267efe4babfb647a4d5cd46ecb60f07fbc212c SHA-256: 0b46964a8ab2bfcad35fdc449be58db96fdac197d3050ca94a66c4175c25c2bb
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/strik?utm_term=jenn+air+electric+range+burner+not+working PDF link annotation
    • http://znakomstva18x.site/mofidolomarakilifepnx3w1.pdfIn PDF document text
    • https://cdn.sqhk.co/wiluxuko/SspPXTq/2d_shapes_games_online_free.pdfIn PDF document text
    • https://cdn.sqhk.co/supopareso/0HjaQF6/12154760495.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414161/normal_606669ec32184.pdfIn PDF document text
    • https://fofapisobav.weebly.com/uploads/1/3/4/7/134712410/4fa8bfd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445341/normal_601fb162a331a.pdfIn PDF document text
    • http://naturalm.space/watch_the_island_of_dr._moreau_1996_online_freewfsli.pdfIn PDF document text
    • https://cdn.sqhk.co/volumusigu/fMijheC/1764395656.pdfIn PDF document text
    • http://counterman.ru/how_to_sew_a_3d_face_mask_free_sewing_patternmgysn.pdfIn PDF document text
    • https://cdn.sqhk.co/lijuwezasip/JjdiaxX/jutujebodunisuwa.pdfIn PDF document text
    • https://vojosapixetogal.weebly.com/uploads/1/3/4/7/134770394/tizopamedaxopowekiv.pdfIn PDF document text
    • http://juilopkiretlo.ru/aluminium_cladding_sheet_suppliers_in_sri_lankadwaol.pdfIn PDF document text
    • https://cdn.sqhk.co/pajokiman/iyS26hq/gravitrax_expansion_set_review.pdfIn PDF document text
    • https://laxuwipulave.weebly.com/uploads/1/3/5/9/135956831/zuwurewogokuvenizaro.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473637/normal_5fdbda42b8705.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tibitexil/64925648196.pdfIn PDF document text
    • https://s3.amazonaws.com/jutenojamega/fadop.pdfIn PDF document text
    • https://s3.amazonaws.com/tolivajupeku/budagogotage.pdfIn PDF document text
    • https://s3.amazonaws.com/vipuxafol/hope_for_today_and_tomorrow_al_anon.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_off000109eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109EB 5076 bytes
SHA-256: 6754d68c5b6c658776b9b9563d2a231a812d815d8da9c8447613fb91b167eda9
font_01_sfnt_off00011b56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B56 11044 bytes
SHA-256: 3b3f84385917bdd3033faa3fb5a4718f7fc6b465969857aec44aed491ca0aae9

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