Malicious PDF — malware analysis report

Static analysis result for SHA-256 14cd998ebd7b177e…

MALICIOUS

PDF

76.8 KB Created: 2021-03-31 20:05:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c1ed57be00ca60c0f30efa9255a072a6 SHA-1: 7aa7cb211c86068132b2de491cfd0284655a4cc0 SHA-256: 14cd998ebd7b177e0146ba662573007116787022d3cb789a8c69196cab0a74a6
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URI pointing to 'https://resalured.ru/123?utm_term=bed+sheet+sizes+south+africa', which is a strong indicator of a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains text related to 'bed sheet sizes south africa', suggesting a lure to disguise the malicious intent. No scripts were extracted, but the presence of external URIs and the overall malicious verdict strongly suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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/123?utm_term=bed+sheet+sizes+south+africa
    • https://cdn-cms.f-static.net/uploads/4454422/normal_600d6f579b0d3.pdf
    • http://stopnutristrike.ru/94484454398o7q8k.pdf
    • http://groshyk.site/621836914258nt4s.pdf
    • http://xxlmature.site/how_do_i_connect_my_soundpeatss173v.pdf
    • http://kosonetibekub.medianewsonline.com/zokevakapoz.pdf
    • http://familyit.info/85600219726cc842.pdf
    • https://cdn-cms.f-static.net/uploads/4417205/normal_5fe69056446b9.pdf
    • https://static.s123-cdn-static.com/uploads/4387233/normal_5ff2ac8f61359.pdf
    • http://securespot.ru/anomalias_dentarias_de_numero_y_formam9adw.pdf
    • http://sutobep.getenjoyment.net/adobe_flash_cs5_animation_tutorial.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/mubemutolewe/sats_maths_worksheets.pdf
    • http://sijisizaf.rf.gd/gazuxaw.pdf
    • https://uploads.strikinglycdn.com/files/c0f35afe-a779-44d9-adc0-e21b9b7c217f/92097396533.pdf
    • https://uploads.strikinglycdn.com/files/afbd31a6-ade8-44cc-ac17-b1e4241043a3/53662816875.pdf
    • https://uploads.strikinglycdn.com/files/06539e10-f166-4d4c-aa85-d0dff486eee6/93782731887.pdf
    • https://s3.amazonaws.com/tosevud/janufewok.pdf
    • https://uploads.strikinglycdn.com/files/af5f0d34-be13-4ad4-bfd1-6e4685140626/59812189675.pdf
    • https://s3.amazonaws.com/nunakixuma/winrar_for_pc_windows_8._1.pdf
    • http://mimumugemefes.epizy.com/patofisiologi_atonia_uteri.pdf
    • https://uploads.strikinglycdn.com/files/2c3d1020-c516-4283-aa04-9d8ef1bc434d/what_is_a_nice_word_that_starts_with_the_letter_v.pdf
    • http://xojozefobulujox.epizy.com/88298755101.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_off0000ecec.bin
fe1b4aea2c7fd1d168328270a196a18c388dcbe25c4e6f9f2793dd47f48db9a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xECEC 5176 bytes
font_01_sfnt_off0000fe91.bin
230b80f66793ad5a0cff673040a09b6c4fc549943ec8e9e71e7b5b6eb88ca75e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE91 11196 bytes

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