Malicious PDF — malware analysis report

Static analysis result for SHA-256 644ced6ad1dd5f3e…

MALICIOUS

PDF

42.2 KB Created: 2020-11-08 13:21:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 1eaf4c1baec0c32564ea43f5c28583c4 SHA-1: 1fa11b023e8ab0301b89454c6cd1d28aa49e1329 SHA-256: 644ced6ad1dd5f3ec30716d295b5a108c709e2a398d7c51614dc6749d341565a
96 Risk Score
Tags
free-cdn-ebook-manual-lure

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 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 1.0000

Heuristics 4

  • 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.
  • 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://trafficel.ru/123?keyword=bronx+collegiate+academy+dress+code PDF link annotation
    • https://kobigaxa.weebly.com/uploads/1/3/3/9/133997295/xovalow-rezofekolo-nixuneji.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382618/normal_5f94f20842d8d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/730c15d3-bfbb-4d73-b65b-6d0db516141a/xubarabuvamavuforuvevide.pdfIn PDF document text
    • https://s3.amazonaws.com/xenavuxa/when_life_gives_you_lululemons_wiki.pdfIn PDF document text
    • https://pokogamika.files.wordpress.com/2020/11/tebekedebusigevukuponi.pdfIn PDF document text
    • https://s3.amazonaws.com/zedilegol/sworn_statement_army_adp.pdfIn PDF document text
    • https://bidarewabune.files.wordpress.com/2020/11/chinese_characters_writing_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/jowutoneranemuk/words_that_start_with_photo_that_mean_light.pdfIn PDF document text
    • https://s3.amazonaws.com/gotenukevepunin/47048677937.pdfIn PDF document text
    • https://xigikomi.files.wordpress.com/2020/11/donafujikataror.pdfIn PDF document text
    • https://s3.amazonaws.com/gifiz/92942790706.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77637e8e-f98e-42cc-9ac6-78c624212d5e/warenetemagadosava.pdfIn PDF document text
    • https://tusaguvi.files.wordpress.com/2020/11/dragon_ball_shin_budokai_2_mod_iso_download.pdfIn PDF document text
    • https://s3.amazonaws.com/naramuro/buremavitetajirelajepesom.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzaganog/donigoturozamisidabako.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_off0000641a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x641A 5480 bytes
SHA-256: ca033cc69149eabb8b4f049566215a0ae8212b5c0090fed4e26cabab190ae6c1
font_01_sfnt_off000076b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76B5 11132 bytes
SHA-256: 919f408aff84bf3263dc3b7e08438c45a3875311ff1015bebf82b8b4b1d52282

Open this report in the interactive analyzer, or submit your own file for analysis.