Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a49edf39eec3c8d…

MALICIOUS

PDF

78.4 KB Created: 2021-02-15 11:43:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 0c9b65598a44a64ae7d7f11563fb9881 SHA-1: d160ab9832ba646be93bc37d60cb70d1c48f7ec6 SHA-256: 6a49edf39eec3c8d0b2927851889f8c11e5ad0ad66022c4169a5abbdcd46a42d
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many of which point to other PDF files, suggesting a link farm or redirection mechanism. The embedded URLs and the PDF structure itself are indicative of a phishing or malware distribution attempt, likely using the guise of providing technical information to lure victims to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://seumenha.ru/wb?keyword=decision%20tree%20induction%20algorithm%20in%20data%20mining%20ppt PDF link annotation
    • http://giocodigital.space/89554162695e462a.pdfIn PDF document text
    • https://cdn.sqhk.co/wosepimi/ibWgeuM/zaniri.pdfIn PDF document text
    • https://cdn.sqhk.co/gulanuwe/EKMhcu2/gumirufonafumazedezatofod.pdfIn PDF document text
    • http://fredo.run/assetto_corsa_race_essentialsh9rn5.pdfIn PDF document text
    • https://cdn.sqhk.co/wujakegu/aiahdhj/uefa_champions_league_match_results_2020.pdfIn PDF document text
    • https://zajebujop.weebly.com/uploads/1/3/4/9/134902249/6750158.pdfIn PDF document text
    • http://copyrightprivacy.site/nubegekawarujewutapaa0pmw.pdfIn PDF document text
    • https://cdn.sqhk.co/pemiduwegam/hhicyGQ/temple_run_brave_play_online_free.pdfIn PDF document text
    • http://sunshop.pro/437987648884owob.pdfIn PDF document text
    • https://cdn.sqhk.co/gavezexu/cifjcjj/asirvad_digipay_app.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385633/normal_600573c6a091c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426690/normal_6006e8258bc1d.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In 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
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBFE 1700 bytes
SHA-256: 3cf75da0d4b7eaa74f74d2bdfcf6762f0c1196310004d13360162e74d4ffb1af
font_01_sfnt_off0000e487.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE487 5368 bytes
SHA-256: 2be83ad8437dc5f75b882abae92ee3638e5973da565c149fe6d24b6ceb1befcc
font_02_sfnt_off0000f691.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF691 11600 bytes
SHA-256: 8cb57cbeecd16e010d87539737332080b18e93f5c9c1724f182572d92f280fe1
font_03_sfnt_off00011e06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E06 4324 bytes
SHA-256: ad623bc7c681097dfa1224999cf6cc6072d3ca9a137655dc1129b0261f0b357c

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