Malicious PDF — malware analysis report

Static analysis result for SHA-256 76681d0c33937ab8…

MALICIOUS

PDF

72.4 KB Created: 2021-02-02 23:17:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 9eda5a9cc7737d5d6b20750f23d381d6 SHA-1: d632f802b173e1b5733d68790ebe7135c35fdb4a SHA-256: 76681d0c33937ab8c8d0eeeffaec0c4bdd69717bdebf4d7646dbaa72b7759b2a
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one prominent link pointing to 'seumenha.ru'. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm or phishing attempt. ClamAV detection and ML classification strongly indicate maliciousness, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/aws?utm_term=anorexia+infantil+pdf PDF link annotation
    • https://cdn.sqhk.co/vusutazomaga/IjjhdwU/sims_4_cheats_skills_toddler.pdfIn PDF document text
    • https://kusanogiwaxug.weebly.com/uploads/1/3/0/8/130873987/davimuluwojufonosa.pdfIn PDF document text
    • https://cdn.sqhk.co/mofekuma/UDkjbEz/dovufajetowiwojedorajepo.pdfIn PDF document text
    • https://bekazavaf.weebly.com/uploads/1/3/5/3/135327011/nenatu_firafuvikoduke.pdfIn PDF document text
    • https://tabogivazosepa.weebly.com/uploads/1/3/1/8/131871767/falaneruf.pdfIn PDF document text
    • https://pemugaladesav.weebly.com/uploads/1/3/5/3/135307247/46cafc7a0def4ad.pdfIn PDF document text
    • https://fiwozipuwawew.weebly.com/uploads/1/3/0/8/130814157/9451373.pdfIn PDF document text
    • https://mogatuzutixu.weebly.com/uploads/1/3/4/6/134684840/4d53cd7a.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/vuzufexarevima/bobinopuvuvopi.pdfIn PDF document text
    • https://s3.amazonaws.com/xufaxoferugod/12378487668.pdfIn PDF document text
    • https://s3.amazonaws.com/fexuror/91669202198.pdfIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/25378623550.pdfIn PDF document text
    • https://s3.amazonaws.com/futamo/pekodowiloleri.pdfIn PDF document text
    • https://s3.amazonaws.com/rerinago/fijusunudev.pdfIn PDF document text
    • https://s3.amazonaws.com/wunojipu/kulakuguveguk.pdfIn PDF document text
    • https://s3.amazonaws.com/jagux/business_plan_presentation_ppt_templates.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_off0000de3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE3F 4912 bytes
SHA-256: 334c92fa68280946702ed636e147e50e99a4c52a41506ff51f9c7a978854de98
font_01_sfnt_off0000ef0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF0A 11396 bytes
SHA-256: 175d4f6207702965dd5f2eaa1a401952bec2e62b1e64fba8b848627284fa0bc8

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