Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce1c41958a9cf6de…

MALICIOUS

PDF

67.5 KB Created: 2020-11-20 16:33:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: d27ec955802afcfcff3e330c14a7ca80 SHA-1: 10fe92b93427d205011cd94b947ff5f0ac3465cf SHA-256: ce1c41958a9cf6de7a043a8572af85945b06a493b61aa0392550d82151add5db
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 URL that appears to be the primary lure, directing users to a suspicious domain. The document body, though heavily obfuscated, suggests a pretext related to an allergy report, aligning with common phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://traffnew.ru/aws?utm_term=dallas+allergy+report+mold PDF link annotation
    • https://nukuzalidoredul.weebly.com/uploads/1/3/4/7/134768970/leregoforutubimexo.pdfIn PDF document text
    • https://roxoxurapu.weebly.com/uploads/1/3/4/3/134307884/4960639.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382781/normal_5faa0e2a65ea1.pdfIn PDF document text
    • https://fuparududewon.weebly.com/uploads/1/3/1/8/131856041/jovirojutem.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460946/normal_5fa4593bf33f4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/3908ad2c-ef99-4159-90c7-48a3008f7f98/74869923825.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxagixil/53414029824.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a07c1933-bef5-4e76-86bf-39a113d0d291/bekudolojefitujigekewav.pdfIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/48682868171.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_off0000ca8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA8E 5380 bytes
SHA-256: 309374d24c7ee0cb7626ca8fb5b1f7c9c0100549384ec21ff9101132e27c9e9a
font_01_sfnt_off0000dcd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCD0 10836 bytes
SHA-256: 819faa2eb0667efd3b8577ba158119280d39562cf9c653c93f6147ebf2c658b1