Malicious PDF — malware analysis report

Static analysis result for SHA-256 37a01f9777069e85…

MALICIOUS

PDF

66.5 KB Created: 2021-02-18 10:59:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 99e8a4807331a128ad68c45ae6914c68 SHA-1: 2f9d7d70843bbd803d8f63e89f647c9afdd46c80 SHA-256: 37a01f9777069e85999cd1fc2fdcef736e6e09a46ad5a73aba8d69c3b52f420a
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://maypoin.ru/123?utm_term=what+spark+plug+for+honda+gcv160 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4371014/normal_5fd70361ebed6.pdfIn PDF document text
    • http://callup.today/variante_bac_chimie_anorganicak9woj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456998/normal_5ffe84e31fc0f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467577/normal_60285bac80c60.pdfIn PDF document text
    • https://zolotamazuragif.weebly.com/uploads/1/3/2/7/132712333/9225232.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401714/normal_5fe388525b514.pdfIn PDF document text
    • http://kiwedoro.66ghz.com/22176497600.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501486/normal_5fe092a06d016.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379045/normal_5fc8fec66c19f.pdfIn PDF document text
    • https://balevowoperat.weebly.com/uploads/1/3/1/3/131397989/mekez_wemad_peveseti.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391024/normal_5fcd5666e0bd2.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/babuxufarizuxur/is_federal_polytechnic_bauchi_form_out.pdfIn PDF document text
    • https://s3.amazonaws.com/wurivuve/princeton_review_sat_practice_test_6_answers.pdfIn PDF document text
    • http://goruwon.epizy.com/6863331874.pdfIn PDF document text
    • http://fekofenuxekit.rf.gd/pelupojipijaxel.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_off0000c547.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC547 5900 bytes
SHA-256: 304d4fd9db7d9d4211959e937d3ade7ab6dcf88c2eab2114c6ee4baa17274d4c
font_01_sfnt_off0000d97a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD97A 10520 bytes
SHA-256: b2753fa471374b3e55fd3189956d0dcc7252ace4d901a04b37d27569bbaa5b2f