Malicious PDF — malware analysis report

Static analysis result for SHA-256 11e0a66a9377b5a5…

MALICIOUS

PDF

81.8 KB Created: 2021-03-16 16:42:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1fbb64fc14f3d2306b18f1a12523cc91 SHA-1: 70741251799f0a8a3633a87e4fb173cd201fd858 SHA-256: 11e0a66a9377b5a5dc7be4ce52500ebad02a4364de728e7eafe685dd3f1c9a31
156 Risk Score

Malware Insights

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

The 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 pointing to potentially malicious domains, suggesting a link farm or phishing lure. The presence of embedded URLs and the heuristic 'PDF_SEO_LINK_FARM' strongly suggest the document's purpose is to redirect users to malicious sites, potentially for malware distribution or credential harvesting.

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://dafemum.ru/wix?keyword=layers+of+earth%2527s+atmosphere+worksheet
    • https://cdn.sqhk.co/juxezijafoz/XndhaYi/19780526090.pdf
    • https://cdn.sqhk.co/joraxeneli/iSiePev/europe_front_full_2._3._10.pdf
    • http://tujijamutibe.sportsontheweb.net/apa_style_referencing.pdf
    • http://tiluvopira.medianewsonline.com/xawiti.pdf
    • http://vopagokiniki.mypressonline.com/darosekitejumuki.pdf
    • https://cdn.sqhk.co/niripakexad/cwjbO8D/gupizonijotofinowevefi.pdf
    • https://cdn.sqhk.co/kopuzeginev/LSiiahd/58843991933.pdf
    • http://nubuxeki.scienceontheweb.net/wizovorefafowuzip.pdf
    • http://zezasarasojid.mywebcommunity.org/best_to_word_converter_nitro_cloud.pdf
    • http://rebezun.mygamesonline.org/like_water_for_chocolate_book_sparknotes.pdf
    • http://fivogudog.iblogger.org/37155278640.pdf
    • http://rarubife.mygamesonline.org/numark_ttusb_belt_size.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://tonabezagarizom.epizy.com/thomas_merton_quotes_seven_storey_mountain.pdf
    • http://bafuwujix.atwebpages.com/94751065222.pdf
    • https://9c43cb74-45e3-47de-9527-fda2e8336169.filesusr.com/ugd/af0aa9_fb70eb8194304e4ca73b6d47ba3397fa.pdf?index=true
    • http://belibivizonojo.myartsonline.com/online_editor_add_pages.pdf
    • https://47a25507-5c4f-4e73-9b7c-0c49514c8174.filesusr.com/ugd/e00bd3_2e9b6cba0de14fa6972792cb92450f8b.pdf?index=true
    • 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_off0001015b.bin
522c5cc8ef5de193080e978966c72a8189da0bdb06326bad068ab175aae06409		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1015B 5340 bytes
font_01_sfnt_off00011381.bin
e58ae20542eedb941463c8275a493a7c33fcb669c12628a894874650291559e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11381 11628 bytes

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