Malicious PDF — malware analysis report

Static analysis result for SHA-256 84a570d2eb4a767d…

MALICIOUS

PDF

46.4 KB Created: 2020-11-09 15:48:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: f5ae4d034af94a55c60698fe9f4edd05 SHA-1: dd270108683cdf17ba7baf141e94e3cff6f8c444 SHA-256: 84a570d2eb4a767d593c9e10604812789e0cccfe28c3408c55e38d162136a71c
94 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file 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 3

  • 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.
  • 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/strik?keyword=math+fun+book+answers+grade+7 In PDF document text
    • https://zupipozove.weebly.com/uploads/1/3/4/5/134589893/c1c5e5dbf23f.pdfIn PDF document text
    • https://gomemetunugup.weebly.com/uploads/1/3/2/7/132712315/desojepiliw-jakuxavinotovot-givijidupudu-wulunovu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426682/normal_5f9c6f6d10ad5.pdfIn PDF document text
    • https://turikiripejuz.weebly.com/uploads/1/3/4/5/134501804/valunonavinural-liwekokalin.pdfIn PDF document text
    • https://morozosewiveloz.weebly.com/uploads/1/3/4/3/134387595/9447651e0656.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374535/normal_5f9b286e39309.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414687/normal_5f9b0b558efdb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367631/normal_5f8d1bfd363eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379371/normal_5f9930dade968.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367621/normal_5f879b18e53e8.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/lodunixodetum/vandalia_courts_vandalia_oh.pdfIn PDF document text
    • https://s3.amazonaws.com/tetenifeme/ielts_speaking_task_2_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/falevi/62731946791.pdfIn PDF document text
    • https://s3.amazonaws.com/lujatolu/the_sun_trail.pdfIn PDF document text
    • https://s3.amazonaws.com/bezegoluzose/jawetogozad.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_off00007317.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7317 5516 bytes
SHA-256: df6d9f80ba00b0d088867e3c79d10006fefc4f70a1bf450975ea6840ccbcd0e2
font_01_sfnt_off000085fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85FA 11280 bytes
SHA-256: d9dc7790a5c78b4fe6fed4d6e6a03162e9df73fc7affc55d2941ca1f9a04b242