Malicious PDF — malware analysis report

Static analysis result for SHA-256 237fdcd157f45283…

MALICIOUS

PDF

74.9 KB Created: 2020-10-26 05:00:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 97a5f74678533930078d215c18eaf76a SHA-1: d755a88ae9e9be74bdd9e873641a8c2bc59fc641 SHA-256: 237fdcd157f4528320767d28b848025e93529ae4868c342a57e442e51d77bd1c
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 0.9999

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://ggtraff.ru/strik?keyword=pro+ana+site+officiel In PDF document text
    • https://lesofetu.weebly.com/uploads/1/3/1/3/131378838/ed66499a7cc.pdfIn PDF document text
    • https://fijefozumomaba.weebly.com/uploads/1/3/4/4/134491855/borufi_sozikukikugi_nolujozaras.pdfIn PDF document text
    • https://lotagixowila.weebly.com/uploads/1/3/1/1/131164100/boxowarumo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368494/normal_5f897c8957f2a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388160/normal_5f961578d48ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377113/normal_5f920190ace0a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379230/normal_5f8b23eb00eb6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389107/normal_5f8e7f5b55524.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384471/normal_5f92ab9d835fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369487/normal_5f8a07eddfc2d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368249/normal_5f89743b24ee2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369659/normal_5f88bb2f92dad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379229/normal_5f8db1e3b7117.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389080/normal_5f8f5983db756.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417997/normal_5f961e2e755fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366331/normal_5f88c3a960868.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/donake/schools_and_society_a_sociological_approach_to_education.pdfIn PDF document text
    • https://s3.amazonaws.com/buxoparadazegu/comment_assembler_2_ensemble.pdfIn PDF document text
    • https://s3.amazonaws.com/jarawaxanivu/biochar_journal.pdfIn PDF document text
    • https://s3.amazonaws.com/widiku/national_geographic_keynote.pdfIn PDF document text
    • https://s3.amazonaws.com/lejivugeleguwod/newesezozalikexod.pdfIn PDF document text
    • https://s3.amazonaws.com/magapeguwabe/aspera_f24_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/bokelur/synchrodestiny_deepak_chopra_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/norozovijalu/15347506962.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_off0000d618.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD618 4664 bytes
SHA-256: de9bb11002c75e76fa705257b07e49c106447e24ce0f11c988f5351a1e056664
font_01_sfnt_off0000e5ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5EE 13780 bytes
SHA-256: 08bf278caaad39f701798884e08f3f3a403c694210d46cab0642186fff7dccb8
font_02_sfnt_off00011031.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11031 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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