Malicious PDF — malware analysis report

Static analysis result for SHA-256 f54fab1b74bb281a…

MALICIOUS

PDF

71.4 KB Created: 2021-01-06 06:42:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: f23afe69ad1be228b34373ec9090219d SHA-1: 5d50168c1f4b24739e0dd0d796d552484d7497ea SHA-256: f54fab1b74bb281aa5bd3e6b5df873d250959fd93469c5a38002b5bdbc715b1e
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to PDF files hosted on various platforms, suggesting a link farm or redirection mechanism. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. Although no scripts were directly extracted, the PDF structure and embedded URIs are indicative of a phishing lure designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/123?utm_term=college+of+music+fsu PDF link annotation
    • https://ziripovopibew.weebly.com/uploads/1/3/0/8/130874468/3670096.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411220/normal_5fdd852843c33.pdfIn PDF document text
    • https://zimuvudiredefux.weebly.com/uploads/1/3/2/7/132710782/jinufebilezaja.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389108/normal_5fc349e48e3cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473947/normal_5fe9ed1d5102e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403533/normal_5fd07947006dc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420239/normal_5fe2d9d691219.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451929/normal_5faf10dc4314a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407316/normal_5fbab239a15a2.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/sefipa/tiwowixizus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83f7d906-e9ef-4cf6-b305-26ebe6384014/central_new_jersey_escort.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8a310a2-5a7e-4706-8e2e-47406a158459/23702309893.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d179879e-fce9-4d45-a12e-1e391be187fa/mobawezuxoxomufego.pdfIn PDF document text
    • https://s3.amazonaws.com/muwomapotumugi/autocad_2007_for_windows_10.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_off0000dbe3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBE3 4800 bytes
SHA-256: 1cb94d38743cb0ee81eb1524a46358da89d373bb9f353364a5c411cbd43d2619
font_01_sfnt_off0000ec35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC35 11032 bytes
SHA-256: 153351d80aebcb1a8497d7d736aec9d39d8f06ba69aa17d82ac379269f65f14c

Open this report in the interactive analyzer, or submit your own file for analysis.