Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7ef2b72b5f5bdde…

MALICIOUS

PDF

74.6 KB Created: 2021-02-19 00:45:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: d215d7afa361d6a78888bc6bb56e79ae SHA-1: 3ba6486553f3d47dc120297d347d03ee5bea1c7b SHA-256: b7ef2b72b5f5bddef23ee9cad3b3cdedf1299ccd2e09413db2d2fff3b363b4ab
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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=how%20long%20to%20dehydrate%20ground%20deer%20jerky%20in%20dehydrator PDF link annotation
    • https://xoxajunun.weebly.com/uploads/1/3/4/3/134351876/gexasufuvenipej.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488141/normal_5fe0fcf56aee4.pdfIn PDF document text
    • http://hdsamara.ru/benaletekuliberuwus14rt.pdfIn PDF document text
    • https://wufomuwu.weebly.com/uploads/1/3/0/9/130969972/zusota.pdfIn PDF document text
    • https://bafewalu.weebly.com/uploads/1/3/5/3/135350628/gatixa-bivizebulil-fefatefodulo-fujowolo.pdfIn PDF document text
    • https://fezadegijowazon.weebly.com/uploads/1/3/4/0/134096780/mewisit_daferidez_rofikexasuw_janufa.pdfIn PDF document text
    • http://trackengine.host/xudabix6tr.pdfIn PDF document text
    • https://vebuwume.weebly.com/uploads/1/3/5/3/135349689/wewin.pdfIn PDF document text
    • http://googsnat.space/xepazanehfyxy.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413016/normal_5fde35991c3d5.pdfIn PDF document text
    • https://pefemodadiz.weebly.com/uploads/1/3/4/5/134520562/b7f5bb78811.pdfIn PDF document text
    • http://gtmedis.com/nisabav9abqi.pdfIn PDF document text
    • http://vykupavto54.ru/mu_cv_min_phwimhr.pdfIn PDF document text
    • http://kinatoguvekajux.22web.org/fitted_crib_sheets_size.pdfIn PDF document text
    • https://wamukefak.weebly.com/uploads/1/3/5/3/135324497/mupunajonamoturun.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://busilumun.rf.gd/sewazaxenubawapopijasez.pdfIn PDF document text
    • http://kavotipuwevir.epizy.com/kitibo.pdfIn PDF document text
    • http://fugewep.rf.gd/95606910237.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_off0000e83e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE83E 5204 bytes
SHA-256: 3e3db4421a2b446e1e31478e01481f4cce47b2603b8bdd97d15431da14ad3a6e
font_01_sfnt_off0000fa02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA02 10328 bytes
SHA-256: 0fdc94dfc74bd5a3fec9d1b1620faedae8a8db6ed030ce76216c621c1a789da1

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