Malicious PDF — malware analysis report

Static analysis result for SHA-256 da7b53db5600d309…

MALICIOUS

PDF

73.0 KB Created: 2021-02-03 09:41:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 5cbd7811e9aba8b75470e8f7560638fe SHA-1: bfbccb7193826d4f7d6a07788c638df4da82247d SHA-256: da7b53db5600d309920dbca85ea3a58be68c7c7230b88af60e685db0cdead952
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which are hosted on disposable domains or link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document designed to redirect users to potentially harmful content.

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://druttle.ru/wb?keyword=cooler%20master%20devastator%203%20driver PDF link annotation
    • https://cdn.sqhk.co/veletafi/hhjCUch/25882607823.pdfIn PDF document text
    • http://vekvelo.ru/game_latest_cataloguezrlk8.pdfIn PDF document text
    • https://cdn.sqhk.co/fexilejedit/ihhhija/69859586754.pdfIn PDF document text
    • https://cdn.sqhk.co/tumowara/iaGgdJD/91306307299.pdfIn PDF document text
    • https://kadibunafi.weebly.com/uploads/1/3/0/9/130969561/5324793.pdfIn PDF document text
    • http://plsale.pro/motu_patlu_cartoon_movie_mp4_3gp2rojj.pdfIn PDF document text
    • https://jigaposu.weebly.com/uploads/1/3/5/3/135397088/3617114.pdfIn PDF document text
    • https://cdn.sqhk.co/wetilusogaki/ahdOlha/learn_python_full_course_for_beginners.pdfIn PDF document text
    • https://cdn.sqhk.co/sopiloroda/ighcjhS/nelekav.pdfIn PDF document text
    • http://lessonsonline.site/gilazajaa07p1.pdfIn PDF document text
    • https://fojiwuduz.weebly.com/uploads/1/3/5/3/135309278/siledemok_tozozifeduli_depojulelogimej_fijegoru.pdfIn PDF document text
    • https://fumitalabojaluk.weebly.com/uploads/1/3/5/3/135399187/5897288.pdfIn PDF document text
    • http://itagreen.fun/bloodlines_richelle_mead_download_free1770c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/fatikonavori/ganesh_devotional_songs_telugu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE65 4900 bytes
SHA-256: 8959edb9c478b7338f4918dedb5c4264f273211f323a582777c52435b4f7392b
font_01_sfnt_off0000df12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF12 12484 bytes
SHA-256: 351b18580b7502c72dda8996acf1deda463809ab30eb08d79a596435a53e41e7
font_02_sfnt_off00010752.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10752 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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