Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b794b7c4dbd1974…

MALICIOUS

PDF

106.6 KB Created: 2021-02-16 09:46:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: a91763bafc6b57bbac98637f59ef90ad SHA-1: 3744779d771d137089a35ceedca7baf818ba2349 SHA-256: 3b794b7c4dbd197423061cee29b9a837215c77277a484ae916a8f691f5762278
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 specific detection name indicating phishing and trojan characteristics. An embedded URI points to a suspicious domain related to forex trading, suggesting a phishing lure. While no scripts were explicitly extracted, the PDF structure and embedded URI strongly indicate a malicious intent to redirect the user to a harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/strik?utm_term=how+to+trade+forex+as+a+beginner PDF link annotation
    • https://cdn.sqhk.co/dixejetafap/dhthamu/58759983392.pdfIn PDF document text
    • https://cdn.sqhk.co/mipekakiri/02JjjUV/crash_dive_mod_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483337/normal_600484594536a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447433/normal_5fd35078ac6b2.pdfIn PDF document text
    • https://cdn.sqhk.co/nobixapo/fjeieij/doponenam.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484815/normal_6007ffe189bf1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371023/normal_5ff35b60be5dc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://folalolitawos.epizy.com/97482539724.pdfIn PDF document text
    • https://s3.amazonaws.com/mamukawaxatali/android_studio_proxy_settings_in_gradle.pdfIn PDF document text
    • https://s3.amazonaws.com/tabobujimo/tigukimudo.pdfIn PDF document text
    • https://s3.amazonaws.com/warapagefasovi/64788252943.pdfIn PDF document text
    • https://s3.amazonaws.com/vuliwisuwig/zuzozajumave.pdfIn PDF document text
    • http://lowefukoxoxegab.epizy.com/applied_mathematics_jhunjhunwala.pdfIn PDF document text
    • http://koxaxinum.epizy.com/wibolazagikatililu.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_off00016301.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16301 5304 bytes
SHA-256: 0c53ef46162b38fd032a4db37dfa0ced737a095d184afaab105e45d704c52f2c
font_01_sfnt_off0001752e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1752E 11756 bytes
SHA-256: e5babf1b0cd1ea85f6f08891d1eb5c3407fb35e7225cb1273d0e9b038dd287db