Malicious PDF — malware analysis report

Static analysis result for SHA-256 c10a650e6bee3c83…

MALICIOUS

PDF

80.0 KB Created: 2021-03-29 14:18:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ab889218357d43a776183dbd626ee806 SHA-1: d552e5e0be892fed6f9b096fb33339d872f9feb6 SHA-256: c10a650e6bee3c83d1e6cbb3c94345fdea4c5204d842ae2d124baccae3e1177b
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely used to deliver a secondary payload or conduct phishing. The document body, though heavily obfuscated, appears to contain keywords related to a guide, suggesting a social engineering lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://pelibifir.ru/123?utm_term=evelynn+aram+guide
    • http://nozumupi.medianewsonline.com/cesare_lombroso_books.pdf
    • https://static.s123-cdn-static.com/uploads/4491965/normal_5fee72fbe8fb2.pdf
    • https://static.s123-cdn-static.com/uploads/4417321/normal_5fc6c05ada839.pdf
    • https://static.s123-cdn-static.com/uploads/4423715/normal_5fe059fbca2d1.pdf
    • http://vuxokiwi.22web.org/application_for_canadian_citizenship_2017.pdf
    • https://xevupuwikuguv.weebly.com/uploads/1/3/0/8/130814145/dubojonevowenan_gevupuvigejeji_velivave.pdf
    • http://rixuliketasaban.mywebcommunity.org/13661911215.pdf
    • http://vozuzutiwajuzip.getenjoyment.net/largest_economies_of_the_world_ranking.pdf
    • http://bigijawiv.scienceontheweb.net/vilok.pdf
    • https://pegepigav.weebly.com/uploads/1/3/4/4/134481067/gazelurokumelu.pdf
    • http://bipowilago.mywebcommunity.org/le_pastoralisme_en_algrie.pdf
    • http://nalipuderasifo.iblogger.org/16259242213.pdf
    • https://vororesefuvemux.weebly.com/uploads/1/3/0/8/130813496/7129055.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://bolirazebaf.myartsonline.com/bromatologia_y_tecnologia_de_los_alimentos.pdf
    • https://05efeaee-ea5b-4dc8-bddc-a5098cc0dcbd.filesusr.com/ugd/c06c30_b6c7a08844854955bbe47873a1cb5364.pdf?index=true
    • http://kapifotezuxevup.epizy.com/51745732117.pdf
    • https://557345b1-98c6-442d-b460-9e357c178e5b.filesusr.com/ugd/dfb5f8_12a34d3d8fa14c77b9ec8e5732a847e4.pdf?index=true
    • https://6b5d12f1-3bbc-48af-9ddb-5430d2fe15e7.filesusr.com/ugd/3bf302_75c1eaf77bad4057a6bcb9c3fda60e4a.pdf?index=true
    • https://849bdae7-2456-4570-9e2a-fc769e7e49ad.filesusr.com/ugd/2074c9_42efb0cc59ec489fa31ec14364c6cca7.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_off0000fbf1.bin
3397a6b5a7ce6d1648bd74944b4f01439623d748efc78832c5f92d7f0a010d2a
pdf-font-stream PDF embedded font (sfnt) at offset 0xFBF1 5088 bytes
font_01_sfnt_off00010d39.bin
39a03b5ee153ceee90c4e3566c5761754719f9c442713be495a55f7de7eb0670
pdf-font-stream PDF embedded font (sfnt) at offset 0x10D39 11160 bytes