Malicious PDF — malware analysis report

Static analysis result for SHA-256 b99117caf4bcf6fe…

MALICIOUS

PDF

70.6 KB Created: 2021-02-03 03:03:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: ccebc44997bf7aeb035ec770d182e952 SHA-1: cdacb31658f5e9c7be9cd36ecac1d13b869f0991 SHA-256: b99117caf4bcf6fe90abf2e02c4904764f0b7da5e8b44bfee8958b286b99b3e6
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://jottigo.ru/aws?utm_term=chrome+browser+version+73 PDF link annotation
    • http://yewes.space/mozofinosugiluxagayab8h.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369493/normal_5fce3fae4ba5c.pdfIn PDF document text
    • http://originalhallyu.com/wolekariwemiv4zszd.pdfIn PDF document text
    • http://jigunemav.22web.org/94344684741.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403685/normal_5fc9c081224b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417025/normal_5fd0b9e79c93c.pdfIn PDF document text
    • http://luxshop21.site/85454037645p0gf0.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/levumoduf/19039004678.pdfIn PDF document text
    • https://s3.amazonaws.com/panalipolifod/13226212471.pdfIn PDF document text
    • http://petilawunabebi.epizy.com/74148636828.pdfIn PDF document text
    • http://liwumulexajuvi.epizy.com/nudererepejikovufotax.pdfIn PDF document text
    • https://s3.amazonaws.com/getizar/47306947950.pdfIn PDF document text
    • http://bifezuragumizi.rf.gd/best_chroma_key_app_android.pdfIn PDF document text
    • https://s3.amazonaws.com/vufuzewasi/romakuvo.pdfIn PDF document text
    • http://jenulozamaberur.epizy.com/62824845297.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_off0000d5b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5B6 5124 bytes
SHA-256: f72c161ae550f8f7cec9df9208fbd50c4235c48bed739d466946ad7f1d5fcf8f
font_01_sfnt_off0000e714.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE714 11260 bytes
SHA-256: 19fd2c1cc95923860ab509f04d96a86a7af3e43e9efcefb3a87fa179ce51a2e9