Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3364ecc5440ecb3…

MALICIOUS

PDF

69.8 KB Created: 2021-02-09 00:38:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 31aabf3c9cb51d472b7a18b4fcc3b8f4 SHA-1: c10251bce5387cf616891e7ab47f46148a509f99 SHA-256: c3364ecc5440ecb3fc31e01c7a4633e3b42ac5d665b3f729b19bc0d4bb91441a
96 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The embedded URL, https://jacksth.ru/123?utm_term=what+is+the+ultimate+gift+about, suggests a phishing or scam attempt disguised as a gift-related topic. No scripts were extracted, but the presence of external URIs indicates a likely attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jacksth.ru/123?utm_term=what+is+the+ultimate+gift+about PDF link annotation
    • https://cdn.sqhk.co/nuvexajamu/ciciyNY/head_soccer_world_cup_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476273/normal_600fd2297389c.pdfIn PDF document text
    • https://vezulapas.weebly.com/uploads/1/3/0/9/130969209/wufusunonebitomiji.pdfIn PDF document text
    • https://cdn.sqhk.co/bujutinape/hsUEesD/pajiwumotumo.pdfIn PDF document text
    • https://rifojiditesi.weebly.com/uploads/1/3/1/3/131379396/guwajaxiserekib.pdfIn PDF document text
    • https://zulevoto.weebly.com/uploads/1/3/2/6/132696122/saravun_nefowu_volajelobumuz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471484/normal_5ff277acf1500.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467036/normal_5fc724346039c.pdfIn PDF document text
    • https://cdn.sqhk.co/rogekanus/HyjzSid/kpop_charts_music_bank.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jamuluvuvava/tajutaxopuneledos.pdfIn PDF document text
    • https://s3.amazonaws.com/kosipefojaw/angina_types.pdfIn PDF document text
    • https://s3.amazonaws.com/tawosutosuxi/new_albums_2019.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d4a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4A5 5240 bytes
SHA-256: 4e3b3ee7c65096213a1154d6e2cb89209a6da18f2b6d8752b89eee694cd2d9a9
font_01_sfnt_off0000e666.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE666 10748 bytes
SHA-256: 61a714345bacdd6c95b2bebffcfd4e0a263545ebe607006fcf49ad98c88d30d3