Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0e1b04c136f05ca…

MALICIOUS

PDF

70.1 KB Created: 2021-02-07 21:39:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: ced492a895e4ac20791877fcef36fc85 SHA-1: 958a2f6b599da21a53989ea72470f93bf0e5e78c SHA-256: b0e1b04c136f05ca417af1d81d0647a9d896da0acaa98ddedfe4e1d0d7ded998
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'maypoin.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a technical topic, which is a common lure for malicious documents. No scripts were extracted, but the presence of external URIs and the overall detection profile strongly indicate a malicious intent.

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://maypoin.ru/aws?utm_term=constant+voltage+transformer+circuit+diagram PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4470543/normal_5fd3a41fcb93f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451027/normal_5fe31ed7d3cc6.pdfIn PDF document text
    • http://prodson.fun/59600412125hmv7y.pdfIn PDF document text
    • http://0fruits.space/53576615456no09q.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409123/normal_5ffa15a2a6af8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389793/normal_5fe56032000a3.pdfIn PDF document text
    • http://paypallsecurity.com/zomaz61iar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388608/normal_5fd66b8f9b704.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446490/normal_5fe4b4f950183.pdfIn PDF document text
    • http://eduha.online/79095960160jpafw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417206/normal_5fd0545ec6f0f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pojasiw.rf.gd/kodiserego.pdfIn PDF document text
    • http://rupegofiminatef.epizy.com/blu_ray_movies_2019.pdfIn PDF document text
    • http://kekarizirisa.rf.gd/critical_limb_ischemia_guidelines.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_off0000d486.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD486 5304 bytes
SHA-256: 1c32f174f6aae530fd1f685a1d0a256bc287d1173e30f2bdc6e23d5df5d4d839
font_01_sfnt_off0000e680.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE680 10856 bytes
SHA-256: 60f3f1d7b7ad3fa95c30890661a67e420058412ac961dd41f8e4eb3b494aa3ab