Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff981f285de7979b…

MALICIOUS

PDF

51.7 KB Created: 2020-10-27 06:56:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 459240a9ade857748f645dbb36e20b3d SHA-1: 29b56fe834ae81dae82678928e12e5fbd6135c68 SHA-256: ff981f285de7979b9f2aecd3e2d60177a396f78eb365b261ab5659c56fd5f93a
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=georgetown+day+school+jobs In PDF document text
    • https://tudasuli.weebly.com/uploads/1/3/4/4/134403402/5fb1c2ba577e.pdfIn PDF document text
    • https://texitanoz.weebly.com/uploads/1/3/0/7/130739996/7228805.pdfIn PDF document text
    • https://wefamojugibe.weebly.com/uploads/1/3/1/1/131164519/cf3fc542d3ad.pdfIn PDF document text
    • https://xumogimunosu.weebly.com/uploads/1/3/1/6/131607683/pubowiranemifidifole.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393197/normal_5f9197a7b151b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379380/normal_5f8a68a63add5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369491/normal_5f899e9a045cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369317/normal_5f8ee057b896a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369912/normal_5f95650daea17.pdfIn PDF document text
    • https://zozolexiwu.weebly.com/uploads/1/3/4/3/134343356/domare.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/ac3aefa8d5ca3b0.pdfIn PDF document text
    • https://furureseseruwa.weebly.com/uploads/1/3/4/4/134481841/2964252.pdfIn PDF document text
    • https://jiwadurator.weebly.com/uploads/1/3/0/7/130776405/luxepulivagawuv.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/zetare/91286817264.pdfIn PDF document text
    • https://s3.amazonaws.com/jexijer/bilateral_investment_treaty_india.pdfIn PDF document text
    • https://s3.amazonaws.com/jusuberu/71376785820.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/15076028100.pdfIn PDF document text
    • https://s3.amazonaws.com/ronatiduzoxij/65452489976.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/vejobewimaburegewodem.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/zesiberad.pdfIn PDF document text
    • https://s3.amazonaws.com/defipedibe/materialismo_espiritual.pdfIn PDF document text
    • https://s3.amazonaws.com/dutimajizowa/34419963555.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/xalibun.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_off00007d50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D50 5380 bytes
SHA-256: ea0ae4c1038e9a4a5a61f3bb7576219418439f8e566f9c786e9b9a6c6fdbf376
font_01_sfnt_off00008fae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FAE 10312 bytes
SHA-256: 30885bc861f887c342b40c3d68bb71765b47da5e039abea297d71fa09e67ffe8
font_02_sfnt_off0000b2f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2F6 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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