Malicious PDF — malware analysis report

Static analysis result for SHA-256 e89685daabee3840…

MALICIOUS

PDF

58.5 KB Created: 2020-11-22 10:20:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: bcdf586bca15d5db7239a24f5984afbd SHA-1: 176faa2262588d6626ebb45a985e3778f0f88445 SHA-256: e89685daabee384047c3afb11f581901ccb217306cf8d7b2d351a70e5e7a836c
96 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, and it contains an embedded URI pointing to a suspicious domain. The document body, though heavily obfuscated, suggests it is intended to appear as a document, likely to trick the user into clicking the malicious link. No scripts were extracted, but the presence of an external URI is a strong indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://trafficel.ru/123?utm_term=w+in+cursive PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4403271/normal_5f933072a7931.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371808/normal_5f9ad6c6d4528.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365553/normal_5f946c7bb6950.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366360/normal_5f87549f37854.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374185/normal_5fae3fc6ba851.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386361/normal_5f8f76671c526.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476288/normal_5fad67cae8b8c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467601/normal_5faa2d3294ce1.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/tapexiw/arinc_429_espaol.pdfIn PDF document text
    • https://s3.amazonaws.com/gulapore/pobabofejemiwitusavo.pdfIn PDF document text
    • https://s3.amazonaws.com/mokuwanibof/65731132843.pdfIn PDF document text
    • https://s3.amazonaws.com/sazixipame/ellen_warner_graham.pdfIn PDF document text
    • https://s3.amazonaws.com/gateme/23235431821.pdfIn PDF document text
    • https://s3.amazonaws.com/fulomufimikim/32063858003.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_off0000acfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xACFE 4624 bytes
SHA-256: 4672d0cde8ba24c4e0477a37aeb7b4b2eae9648b50055985e61272d7ca37ae2b
font_01_sfnt_off0000bcdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCDC 9696 bytes
SHA-256: 492d4413475bbc5b3e55d11f88a940463aa2343aff5496b97a721f95152a09f3