Malicious PDF — malware analysis report

Static analysis result for SHA-256 9722680b4c4ee6c4…

MALICIOUS

PDF

46.6 KB Created: 2020-10-27 01:44:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: ce1b0973ad06870186490fb6cb019205 SHA-1: d4cf521068e6cd76d32e459017d33bf77b6b8f23 SHA-256: 9722680b4c4ee6c4f190a0c643ae23f413f7d49737b076e57f7e4f95d132123d
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://cctraff.ru/123?keyword=used+books+tulsa+oklahoma In PDF document text
    • https://cdn-cms.f-static.net/uploads/4387816/normal_5f9395c6a8c95.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374852/normal_5f912a0b3ef41.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407314/normal_5f94958866bb4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401540/normal_5f9475247b4aa.pdfIn PDF document text
    • https://sokuvotaboraj.weebly.com/uploads/1/3/0/7/130776263/e294ec93a97e0c.pdfIn PDF document text
    • https://busiwilepajij.weebly.com/uploads/1/3/4/3/134353274/4775754.pdfIn PDF document text
    • https://xujaxivef.weebly.com/uploads/1/3/1/4/131438557/zikoviwodedupili.pdfIn PDF document text
    • https://wajiresejepo.weebly.com/uploads/1/3/0/7/130774962/bab531a7.pdfIn PDF document text
    • https://togitarusufojir.weebly.com/uploads/1/3/2/6/132681229/246df1eec6e.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/rerinago/22263027681.pdfIn PDF document text
    • https://s3.amazonaws.com/ladojenefe/describing_physical_appearance_in_english.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/79633557667.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/lekaledutuzugemomip.pdfIn PDF document text
    • https://s3.amazonaws.com/nerugiraxura/strategic_culture.pdfIn PDF document text
    • https://s3.amazonaws.com/genedonapubefe/business_intelligence_tutorial_for_beginners.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/baeyer_villiger_rearrangement.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/political_campaign_strategy.pdfIn PDF document text
    • https://s3.amazonaws.com/xesigeze/75872523833.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/liwubivobajodepa.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/wezanojimibilidesowosemu.pdfIn PDF document text
    • https://s3.amazonaws.com/jukoxisojow/endangered_species_list_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/mizeteb/23603120863.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/87344996184.pdfIn PDF document text
    • https://s3.amazonaws.com/rawesaragegugar/mapa_mundi_completo_em.pdfIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/renuzeve.pdfIn PDF document text
    • https://s3.amazonaws.com/ropuba/metro_2033_art_book.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_off00006af2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AF2 2968 bytes
SHA-256: afcae459a23cd8fad60e71fa482ed795063b178ca7a96d5a337757ed3e51a98b
font_01_sfnt_off00007598.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7598 5164 bytes
SHA-256: 5433ebeb001225ca5a221ec6cd9d644570adb08ac9e87fc179b175a269b0b65e
font_02_sfnt_off00008700.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8700 10892 bytes
SHA-256: f4ef71bba6925726c04ee8809d92fe67400cbc33e827f0ca1145bdedce120431

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