Malicious PDF — malware analysis report

Static analysis result for SHA-256 25716801581afcb9…

MALICIOUS

PDF

73.7 KB Created: 2021-03-20 21:51:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 92e09e61e76a4a12d384b1cfdcdeb0cc SHA-1: 3dcfc5a2595a9218ee1f32a00c73d6bb604122fd SHA-256: 25716801581afcb9882a3af3a718e8ffc30a43bb4eb2d90336aa899fda07d48a
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, identified by heuristics as an external URI and flagged by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, suggests a lure related to 'technology information PDF'. The presence of embedded URLs and the overall malicious verdict strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://botokaw.ru/award?keyword=introdu%25C3%25A7%25C3%25A3o+tecnologia+da+informa%25C3%25A7%25C3%25A3o+pdf
    • https://cdn-cms.f-static.net/uploads/4446761/normal_60119b34a538b.pdf
    • https://sejerujezoxovod.weebly.com/uploads/1/3/1/3/131398555/bojasu-xuvatiw-zisok-fojikok.pdf
    • https://cdn-cms.f-static.net/uploads/4485436/normal_602d10c399b24.pdf
    • https://puwekuzegavezek.weebly.com/uploads/1/3/4/7/134734886/3c1c850369f.pdf
    • http://1-bog.ru/bekuzuxolutexomujozedotaw0d.pdf
    • http://pitushok.space/bapisarolokelomenenimaxart7ah8.pdf
    • http://pixxel.life/shintoismo_libro_sagradokv18t.pdf
    • https://cdn-cms.f-static.net/uploads/4458852/normal_6014449a29a14.pdf
    • http://remont-kvartir-otzyvy.moscow/55841478993kvwhk.pdf
    • http://zathkatow.xyz/free_ganpati_aarti_sangrahnb9r4.pdf
    • http://shoppermarket.online/nadinaworirrf173.pdf
    • https://vedewoxid.weebly.com/uploads/1/3/0/7/130738666/8440216.pdf
    • https://cdn-cms.f-static.net/uploads/4412890/normal_603e7029228a6.pdf
    • http://skout.tech/wasuratuzopisumko0y0.pdf
    • https://static.s123-cdn-static.com/uploads/4485305/normal_5ff17f61833bc.pdf
    • https://roxadaxakisa.weebly.com/uploads/1/3/1/4/131437443/lejumumivax.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/56f3e819-e86f-40a9-a3d6-bf24f8c7ddf4/dragon_ball_z_tenkaichi_mod_ppsspp.pdf
    • https://uploads.strikinglycdn.com/files/bc495892-52f0-44cb-9616-65f9cd5c55af/my_samsung_tv_switches_on_and_off.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_off0000de3f.bin
0ba4d16c072e2c820ead290190a73ea303f84f529418408f0bdb5800f2c0178c
pdf-font-stream PDF embedded font (sfnt) at offset 0xDE3F 5732 bytes
font_01_sfnt_off0000f0d8.bin
e1d2d0eddff4e760f8493738717c829153c39f8f3474129df031dc4636c8976e
pdf-font-stream PDF embedded font (sfnt) at offset 0xF0D8 12732 bytes