Malicious PDF — malware analysis report

Static analysis result for SHA-256 642e003a8d19e165…

MALICIOUS

PDF

109.5 KB Created: 2020-12-26 22:54:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 613d947dd6ce82c5b22398dc30f84596 SHA-1: b2afffd60e475ec4059a4b8bffb179cdc16b38d1 SHA-256: 642e003a8d19e16500c98a84a84799fce51aee1b5af9ef7eef61d1381a77fcc4
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing or link farm attack. It contains a significant number of external links, with one prominent URL pointing to 'traffnew.ru', suggesting a phishing or malicious redirection scheme. The heuristic 'PDF_SEO_LINK_FARM' indicates the presence of numerous external links, likely intended to distribute malware or lead to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffnew.ru/aws?utm_term=elizabeth+islands+fishing+report PDF link annotation
    • https://guzugalaxob.weebly.com/uploads/1/3/4/7/134767263/318422.pdfIn PDF document text
    • https://cdn.sqhk.co/goluxewimabu/ig7ilji/children_s_sunday_school_songs_youtube.pdfIn PDF document text
    • https://laguvibokabab.weebly.com/uploads/1/3/4/3/134383318/wudofukiruj_nuxunajibirajit.pdfIn PDF document text
    • https://mufedagejex.weebly.com/uploads/1/3/4/7/134726032/xurejetexu.pdfIn PDF document text
    • https://zuwumepegowivos.weebly.com/uploads/1/3/1/0/131069935/9124817.pdfIn PDF document text
    • https://cdn.sqhk.co/pixisuja/diiGJbc/tokyo_drift_3d_street_racing_mod_apk.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/veraxawewib/anthropology_optional_notes_for_upsc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d8cbc1b-5ca7-48c3-a797-7203a45de352/tadibajanusunu.pdfIn PDF document text
    • https://s3.amazonaws.com/bejikefowu/flood_in_kerala_project_report.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzamada/columbia_sc_news_reporters.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2685ed0c-8d6a-4895-8ba5-341e90281f35/bazakiduvodu.pdfIn PDF document text
    • https://s3.amazonaws.com/zarevizebi/7964969788.pdfIn PDF document text
    • https://s3.amazonaws.com/xujitezu/majavedubekuxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/354c7e35-873f-4b8d-b0d0-d4aa0a983f4a/callaway_driver_grips.pdfIn PDF document text
    • https://s3.amazonaws.com/gewisetug/high_level_barrows_guide_rs3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a11bbcda-f584-4ef0-9903-177a8fc0e096/68331918663.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_off00016373.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16373 5236 bytes
SHA-256: 414128fa8c777f414e2c82057f35681807690c3879143cc9ef4bd62607b20994
font_01_sfnt_off00017531.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17531 11020 bytes
SHA-256: 20fba4efafc17fb95ccb03bee3119a28964e5e6de8f31815b95dafa33da0d5d1
font_02_sfnt_off00019ab9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19AB9 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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