Malicious PDF — malware analysis report

Static analysis result for SHA-256 34553c3753f76f54…

MALICIOUS

PDF

71.1 KB Created: 2021-01-26 03:42:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 037bddb958130ff01c0fa3eef1542975 SHA-1: eed1e3f43a8c7bfb56e6fd3ae8bd7f883bf054e3 SHA-256: 34553c3753f76f546ad6138b331e2f6233eeac2e12587bb451fd7914223ea9fd
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and configured as link farms, indicating a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests malicious intent, and the ML classifier and ClamAV detection confirm this. While no scripts were explicitly extracted, the presence of external URIs and the overall structure point towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://trafftec.ru/123?utm_term=manual+alignment+machine PDF link annotation
    • https://cdn.sqhk.co/kavonalitego/inaiagf/montrose_bird_sanctuary_chicago.pdfIn PDF document text
    • https://cdn.sqhk.co/wezopexa/BsY9Uhj/gravitational_force_worksheet_grade_5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471688/normal_5fc6d911c6c73.pdfIn PDF document text
    • https://fumirufax.weebly.com/uploads/1/3/1/8/131856188/8563765.pdfIn PDF document text
    • https://tebojizo.weebly.com/uploads/1/3/1/4/131406069/5167b7d6.pdfIn PDF document text
    • https://vasalidut.weebly.com/uploads/1/3/0/9/130969475/8756104.pdfIn PDF document text
    • https://cdn.sqhk.co/nemuvefik/ghWidzv/azara_eau_claire_london_road.pdfIn PDF document text
    • https://ruwatavefi.weebly.com/uploads/1/3/4/7/134704280/9995789a0.pdfIn PDF document text
    • https://cdn.sqhk.co/daladovum/bjg7hgi/71969486741.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419218/normal_600798431fee9.pdfIn PDF document text
    • https://mimejomukokije.weebly.com/uploads/1/3/4/5/134510045/neruzijozajoloja.pdfIn PDF document text
    • https://fajorisovobune.weebly.com/uploads/1/3/4/7/134752278/zosokividamuru_wokexakaweseta_vijumoz_wosimeragux.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452193/normal_5ff32098e5aef.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406775/normal_5fcaf55915185.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/waxapoz/ludifadazana.pdfIn PDF document text
    • https://s3.amazonaws.com/tetenifeme/69408171774.pdfIn PDF document text
    • https://s3.amazonaws.com/jolituzoji/free_hd_movies_online_without_membership.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_off0000d5e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5E5 4944 bytes
SHA-256: f85a8f3a45662401fa7cdbc9e5e71a4638a64e63b98d68e3b63b7d87cce528b5
font_01_sfnt_off0000e6a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6A3 12344 bytes
SHA-256: 3543ae335251658230d92e19bebfaa62d01c5eaa3e90ec05890daebd7380542d

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