Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb520dd5fd6fcc92…

MALICIOUS

PDF

45.6 KB Created: 2020-11-08 11:56:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: b4201f7807b599845db68c04a491fe79 SHA-1: b3cdac41a86881c6ccbbddde5be8e9f93fcb31ea SHA-256: fb520dd5fd6fcc92e9db3563af6d6711c9946bc2190f1e11e4306fabc3bf0f93
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a heuristic firing for a link farm, suggesting an attempt to direct users to numerous external sites. The embedded URL 'https://traffking.ru/aws?keyword=70+weeks+of+daniel+pdf' appears to be a lure, potentially leading to a malicious download or phishing page. While no scripts were explicitly extracted, the PDF structure and link farm heuristic indicate a malicious intent to redirect users.

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://traffking.ru/aws?keyword=70+weeks+of+daniel+pdf PDF link annotation
    • https://fimumoda.weebly.com/uploads/1/3/4/3/134313536/gubagugekexemagesupe.pdfIn PDF document text
    • https://xifobosakup.weebly.com/uploads/1/3/2/8/132815359/lepirelap_kawajuxuvesi.pdfIn PDF document text
    • https://davovexo.weebly.com/uploads/1/3/4/3/134355956/5548625.pdfIn PDF document text
    • https://xemojunaxumig.weebly.com/uploads/1/3/4/2/134265853/9300573.pdfIn PDF document text
    • https://fobolobal.weebly.com/uploads/1/3/4/3/134317950/9416357.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://juregunop.files.wordpress.com/2020/11/pharmacology_made_ridiculously_simple_free_download.pdfIn PDF document text
    • https://zimoverux.files.wordpress.com/2020/11/24183651238.pdfIn PDF document text
    • https://mikifisilub.files.wordpress.com/2020/11/52101485761.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60ec887a-4b98-4b75-a532-fa0aca078965/gujaj.pdfIn PDF document text
    • https://s3.amazonaws.com/xakusineba/kolin_successful_writing_at_work_free.pdfIn PDF document text
    • https://s3.amazonaws.com/paxivogedewilu/trinidad_and_tobago_budget_2018.pdfIn PDF document text
    • https://tidesefotiku.files.wordpress.com/2020/11/76924985045.pdfIn PDF document text
    • https://s3.amazonaws.com/remuv/lilej.pdfIn PDF document text
    • https://s3.amazonaws.com/tutapaxi/kaspersky_sign_in_and_download.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_off0000672d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x672D 4932 bytes
SHA-256: 834e255ebeab0dd2f12196c09e68f7a7d5c7b729398464a3f551aa7e2fd3d9f0
font_01_sfnt_off00007809.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7809 10324 bytes
SHA-256: 55a6a6ac80817b33e82f03f8dcc7e080a863f297c704d144d14f191cfc9edd1b
font_02_sfnt_off00009b6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B6F 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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