Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c5b2e850ce4097c…

MALICIOUS

PDF

77.8 KB Created: 2021-02-11 19:42:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 4b6a72bbec9212db6a973229a8291b61 SHA-1: 743b9f2f8db48df1e88f24dc7e68f1813bd85965 SHA-256: 1c5b2e850ce4097c6050cd13f8f13e8ef413f0b38ca8c9743b738de9d3158775
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://baarspo.ru/123?utm_term=cell+membrane+coloring+worksheet+answers+answer+key+free PDF link annotation
    • http://lighttravel-ng.com/pelofixerhglh.pdfIn PDF document text
    • http://vas-rem.ru/mupasubipewilijabndsj.pdfIn PDF document text
    • http://semengergel.ru/89111786160wi1ap.pdfIn PDF document text
    • http://community-day.ru/34935394415xsx2e.pdfIn PDF document text
    • http://texulateniz.iblogger.org/26989095460.pdfIn PDF document text
    • http://goldstein.berlin/maron_y_pruttond7z5t.pdfIn PDF document text
    • http://my-favshopf.online/eclipse_phase_2nd_edition4f3t3.pdfIn PDF document text
    • http://fitnesspack.net/98229595947axtyn.pdfIn PDF document text
    • http://immorta-cross1.club/71721991407ftc51.pdfIn PDF document text
    • https://cdn.sqhk.co/dejuxafe/hjBijje/pradeep_science_class_9_physics_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rubuvajaroxe.epizy.com/famufe.pdfIn PDF document text
    • http://pagiburisodu.epizy.com/sc_agricultural_tax_exemption_form.pdfIn PDF document text
    • http://gogolozumer.epizy.com/making_a_murderer_2_episode_guide.pdfIn PDF document text
    • http://lafatakijuton.epizy.com/80952002587.pdfIn PDF document text
    • http://jufosuliz.epizy.com/xaran.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_off0000eebf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEBF 5600 bytes
SHA-256: eb8f62f3480e16c2e73372d5b8756eb28116395fc40907cb6a755d381915ee94
font_01_sfnt_off000101b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101B3 11836 bytes
SHA-256: 11e924264e408016c400bf8d308d926a6d54a5990ceee5916fba970098385c27