Malicious PDF — malware analysis report

Static analysis result for SHA-256 5063a1124b972aad…

MALICIOUS

PDF

81.6 KB Created: 2021-03-02 04:38:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f63e0fc84e83f360c97b50328d37065a SHA-1: 55fadb7e70c0ea714ae4aeaf9098b0a9dbf3cc66 SHA-256: 5063a1124b972aad22b74f3bff513d8b4e8d35caacbf75f55344486c4989d528
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 a machine learning classifier, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, many pointing to other PDF files, suggesting a link farm or redirection mechanism. One prominent URL, 'https://lozipotod.ru/123?utm_term=what+is+metaphor+and+give+one+example', appears to be a lure, possibly for phishing or to download further malicious content. No scripts were extracted, but the PDF structure and numerous external links are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://lozipotod.ru/123?utm_term=what+is+metaphor+and+give+one+example
    • https://static.s123-cdn-static.com/uploads/4482405/normal_5ffc4fdd675e8.pdf
    • https://cdn.sqhk.co/noviraxat/gLHZzt3/dixawarune.pdf
    • https://zivozisexime.weebly.com/uploads/1/3/2/8/132814465/3833223.pdf
    • https://cdn.sqhk.co/zelagagunogo/hjAuhjt/cake_recipes_for_diabetics_with_stevia.pdf
    • https://depovazopalixu.weebly.com/uploads/1/3/2/6/132681382/8271837.pdf
    • https://cdn.sqhk.co/vunalogivefu/SjjwggW/koxuxolotikizidometovu.pdf
    • http://0fruit.space/43909665262cen5n.pdf
    • https://cdn.sqhk.co/modajili/Vghjihe/banana_kong_game_guide.pdf
    • https://cdn.sqhk.co/sebazisop/aThdijT/panazitexutenerolumemij.pdf
    • https://vejazejama.weebly.com/uploads/1/3/1/3/131381369/segoziwep-nebugaposez-juxuwulavi-vefogegatukox.pdf
    • http://1freedom.space/knowledge_base_html_template_nulledfzf7r.pdf
    • https://zukixuvaxetili.weebly.com/uploads/1/3/5/9/135988851/f73ecba798a8.pdf
    • https://cdn.sqhk.co/wabajevebe/he1gFAM/27367057085.pdf
    • http://slmit.fun/phrase_structure_rules_tree_diagramhxfxl.pdf
    • http://pasendapp.online/xanuzodazugepeputotufoey9zc.pdf
    • http://selectgetc.top/31093562781tj4mq.pdf
    • https://cdn.sqhk.co/winelolibug/jf1rw03/parentsquare_app_not_working.pdf
    • https://static.s123-cdn-static.com/uploads/4486374/normal_5ffa7eed405c3.pdf
    • https://cdn.sqhk.co/goxobuve/chdLjbQ/100_hits_rock_classics.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000100d9.bin
58ad998ca478244508367bcec303f68663815ecb847fcceea37fac423a8ff2d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x100D9 5512 bytes
font_01_sfnt_off0001137c.bin
8f2d6c7d1b43981b2c30164e3c9cb5c3056d3a86e2be27c39919fdc2c84d308b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1137C 11264 bytes

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