Malicious PDF — malware analysis report

Static analysis result for SHA-256 a96e0e5715fca85c…

MALICIOUS

PDF

80.5 KB Created: 2021-03-20 23:41:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 0ce212e2d71bbce9b7e2736dc3c99f05 SHA-1: 530e9208138282a853abe0ba3c6103bac2d4b774 SHA-256: a96e0e5715fca85c45e5b917c4cde91ae6c1e14ea2e3ee51e36896cbffa45e72
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://kuzutuzo.ru/wix?keyword=wizard101+pet+guide+2020 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4410204/normal_5fe9ab1a3dfef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375342/normal_5fd18bb795f01.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470385/normal_600551da4be74.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480904/normal_5fdd3bbfa4d2a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497131/normal_602ed116474b9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450351/normal_5fff62661e753.pdfIn PDF document text
    • http://slimerecipe.org/muzulilesozuwavorelademfpkgz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393353/normal_5fe3b4248520a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425235/normal_6044fc4b76871.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465703/normal_5ff9de430734a.pdfIn PDF document text
    • http://ig-copyrightnoticehelp.com/gopro_hero4_silver_edition_adventurekw747.pdfIn PDF document text
    • http://bamirajewenexo.medianewsonline.com/what_is_the_coldest_place_in_the_united_states.pdfIn PDF document text
    • http://lezeninimi.medianewsonline.com/dell_1320c_black_ink_cartridge.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415754/normal_604cf5329496b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421939/normal_601b567ece495.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497370/normal_5fe5c228dab36.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499341/normal_5ffd8891e073d.pdfIn PDF document text
    • http://xoroketogejuxe.mywebcommunity.org/guvudenumo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493876/normal_603954b5a6920.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sebokegekesuded.atwebpages.com/cuisinart_chw-12_automatic_coffee_maker.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f09f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF09F 5304 bytes
SHA-256: dc6d2401625782d2fead500745378efa5e64227736865d84087905c006b91d48
font_01_sfnt_off000102cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102CD 3276 bytes
SHA-256: 63654e47e506012e58845125de0636a101c27a400e9f32428a316be23ffd303a
font_02_sfnt_off00010e9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E9C 10972 bytes
SHA-256: 355f49a11114b3cf883adf1e829c1b2c202234f4671889a1c15b0ef61e940457

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