Malicious PDF — malware analysis report

Static analysis result for SHA-256 a858b242bfca1d6e…

MALICIOUS

PDF

68.1 KB Created: 2021-02-28 08:33:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: aa04392f1326cb1ebd614d89df9c1a9f SHA-1: abec773ce1dc8edfe7eaca235eaba29c956972d5 SHA-256: a858b242bfca1d6e4ea740e03ba89c1f660adbe3927da6378df16f5ea2b8f0c6
126 Risk Score

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://gimoguvi.ru/award?keyword=2+step+equations+worksheet+pdf+kuta PDF link annotation
    • http://golden-bridge.pro/xuxizudamedazojkii7.pdfIn PDF document text
    • http://lbaranaydin.com/penalty_kick_movie_reviewps4r2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481667/normal_5fd3486652815.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387931/normal_5fed2707b695d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379605/normal_601b504e6caa6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417029/normal_601faa5e3bb57.pdfIn PDF document text
    • http://mybiol.site/50034546103ffamc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493221/normal_5ff124613f68b.pdfIn PDF document text
    • http://qrettalq.online/kaxosirebulibonigeniwumdu5t4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378425/normal_5ff0dbf6104e8.pdfIn PDF document text
    • http://tvoeobrazovanie.fun/voxebobilupera7zj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402261/normal_5fe356ead38b9.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/tevomenil/5_8_sheetrock_screw_length.pdfIn PDF document text
    • http://xodipexi.epizy.com/fusufez.pdfIn PDF document text
    • https://s3.amazonaws.com/dalava/air_force_one_pixel_jewel.pdfIn PDF document text
    • https://s3.amazonaws.com/gazivemon/cyclone_english_song.pdfIn PDF document text
    • http://mifamin.epizy.com/adobe_reader_professional_free.pdfIn PDF document text
    • http://nitesegu.epizy.com/printable_coupon_template_for_birthday.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_off0000ce07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE07 5416 bytes
SHA-256: 7fce39f7da0119628296c5e42db16e75171fc6fa8b89f8046acbaa257404a2ce
font_01_sfnt_off0000e081.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE081 10148 bytes
SHA-256: 002cd69746e84855a1b6a92ffe01395aa2a46b26f2b1d1a1ba4ff628812f4cc8