Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3566f07d43872c3…

MALICIOUS

PDF

75.5 KB Created: 2021-03-03 23:09:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b3bad08a140fcf6f4f599a08a98de14f SHA-1: b62885ba73ebe3dbebbc8f2a1a5043c4c79e26c8 SHA-256: e3566f07d43872c3e13680aa2c07dbe1a76bcf85f1c059935ea4de2ef427e357
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are to other PDF documents, suggesting a link farm for SEO manipulation or to host malicious content. The primary URL, 'https://resalured.ru/wix?keyword=lords+mobile+hack+no+survey+no+offer', indicates a lure related to game hacking. ClamAV and ML heuristics confirm the malicious nature of the PDF, classifying it as a phishing trojan. No scripts were extracted, but the structure and embedded URLs strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://resalured.ru/wix?keyword=lords+mobile+hack+no+survey+no+offer
    • https://cdn.sqhk.co/wobuwozavenu/g59Qr2H/awesome_tanks_2_hacked_unblocked_66.pdf
    • https://fefodenajefive.weebly.com/uploads/1/3/1/4/131437461/2bd813f400d.pdf
    • https://cdn.sqhk.co/fumamimed/hghdr5d/jegodijitovuf.pdf
    • https://static.s123-cdn-static.com/uploads/4418777/normal_6000a91fb74f2.pdf
    • https://cdn.sqhk.co/zesonixiv/hggIii5/what_is_christianity_symbol.pdf
    • https://cdn.sqhk.co/lekusovu/chdiehi/function_generator_internal_circuit_diagram.pdf
    • https://palavelo.weebly.com/uploads/1/3/4/8/134891967/e7f8544fe6a1cd.pdf
    • https://cdn.sqhk.co/xadowififux/OlIhejf/base_smart_home_systems.pdf
    • https://static.s123-cdn-static.com/uploads/4445331/normal_5fc81aa41158d.pdf
    • https://static.s123-cdn-static.com/uploads/4501660/normal_5ff766f36c905.pdf
    • https://ninuwekij.weebly.com/uploads/1/3/4/6/134625354/tetereze.pdf
    • https://static.s123-cdn-static.com/uploads/4369768/normal_5ff2c6ec1ea2d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/xokebore/momujadovaditedovesusuw.pdf
    • https://s3.amazonaws.com/fizup/arma_3_steam_key_generator.pdf
    • https://s3.amazonaws.com/xurixado/55700702406.pdf
    • https://s3.amazonaws.com/wunupalezozerud/bomber_friends_hack_apk_todo_desbloqueado_2019.pdf
    • https://s3.amazonaws.com/fopalew/3500531857.pdf
    • https://s3.amazonaws.com/tikoweravisixu/ratio_analysis_project_report.pdf
    • https://s3.amazonaws.com/wizitifowubux/fusoxobelabaxufewivab.pdf
    • https://s3.amazonaws.com/boduxatavepe/xeluburipogal.pdf
    • 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_off0000eae6.bin
c09ebce68677c99c31ec49e68f1eb176beb1c19f2c961e8638ecec351e7d8514		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE6 5568 bytes
font_01_sfnt_off0000fdb6.bin
99ce18a27f6a11ff5eb2dee9fc9d97f53aeec0f2e0351e774647652c01cd4527		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFDB6 10240 bytes

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