Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4f5f6a2904d2523…

MALICIOUS

PDF

71.6 KB Created: 2021-02-12 05:49:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: bc588e5d1bd1b8ae5ddb27b677ad791b SHA-1: 0538a5479ae89d3a96fa938412f53c79428c598a SHA-256: b4f5f6a2904d2523cacaf34e33fbf58b29e1dbf5b7d1b12381ba14273ea59b27
126 Risk Score

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 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://jottigo.ru/wb?keyword=diy%20circular%20saw%20guide%20plans PDF link annotation
    • http://want-seo.ru/2016_ap_environmental_science_frq_answersjuq5o.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407084/normal_5fc7353703fcc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476127/normal_5fe7d9e0764d3.pdfIn PDF document text
    • http://casbah2point0.com/jokejirafovapeliweso3r4r6.pdfIn PDF document text
    • http://ecoservice-vlad.ru/photomath_plus_apk_free_download_ios2tygt.pdfIn PDF document text
    • http://biomaniix.website/gowonazixejowiwiwasix52aua.pdfIn PDF document text
    • http://bonboxstudio.com/1350130326g82ob.pdfIn PDF document text
    • http://smartycredit.info/diary_entry_questions_and_answersaf4kw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421770/normal_6008a4011d254.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412996/normal_5fff0aa06aa48.pdfIn PDF document text
    • http://gufutaca3.xyz/54790716706t18xd.pdfIn PDF document text
    • http://nupubidodeje.22web.org/legon_admission_letter.pdfIn PDF document text
    • http://vovpomnim.ru/toronto_travel_guide_expedia93bk4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450434/normal_5fd7e26dcf547.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://giluzufuropej.epizy.com/84250418485.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_off0000d9b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9B8 5436 bytes
SHA-256: 0ee80a858dab6ab420640aa3c13783061d289a47655b23c722173e653d8d8e84
font_01_sfnt_off0000ec60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC60 10960 bytes
SHA-256: 3b5d59a7cf7539747bdc4690a6d1f5fdb70d8fed209c0577295221ee79d44d7b