Malicious PDF — malware analysis report

Static analysis result for SHA-256 c460a793762bdbb4…

MALICIOUS

PDF

69.5 KB Created: 2021-02-21 04:24:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: d270ea7c3531863df74e22afff294e31 SHA-1: b008a935f2c4c119019a195755a2925407afb349 SHA-256: c460a793762bdbb4e5ead6193f9739cb6f5802c602b56cbb359398c4412fa894
126 Risk Score

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 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://jacksth.ru/123?utm_term=average+grade+point+average+in+high+school PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370542/normal_601feed06f2c2.pdfIn PDF document text
    • http://sozetil.66ghz.com/heslo_wifi_android_bez_root.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377371/normal_602163227869a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495841/normal_5fce4ec8d1c9c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371269/normal_600a54b2b333b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448124/normal_602ae0680ad4a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496001/normal_601c7ae18676c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493282/normal_5ffcccd1285d0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gumigojozupe.epizy.com/6866728701.pdfIn PDF document text
    • https://s3.amazonaws.com/rumezo/xanufikef.pdfIn PDF document text
    • http://reratosagozi.rf.gd/caravel_facts_and_information.pdfIn PDF document text
    • https://s3.amazonaws.com/rodakarugupoko/cash_voucher_format_word.pdfIn PDF document text
    • http://konapawejiwevin.epizy.com/acceleration_sample_problems_with_answers.pdfIn PDF document text
    • http://raxatimax.rf.gd/46316852080.pdfIn PDF document text
    • http://ravigokabuf.rf.gd/boboiboy_solar_video_song.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_off0000d154.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD154 5384 bytes
SHA-256: ef3f6994bf94f9909540f4b995cc8eec6b1726ba5b468c684eeb8187d97d2327
font_01_sfnt_off0000e3a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3A4 10900 bytes
SHA-256: 6a98427f0bad77e52a88974fceb50cb049173a4707b724e20de15b234f8b291d