Malicious PDF — malware analysis report

Static analysis result for SHA-256 27a5d0a445e62b4f…

MALICIOUS

PDF

61.5 KB Created: 2021-02-13 01:59:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 5e803571839e9e7957b9100614ee3ab6 SHA-1: 3a724f0888d7f0048ad3fb60bfa12598fdc15632 SHA-256: 27a5d0a445e62b4f075739d65d6241d33b939fa4a085a336f479f637bb472ae3
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/wix?keyword=6.1+practice+b+geometry+answers+page+196 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4406191/normal_5ff69acd44cc5.pdfIn PDF document text
    • http://trastqort.online/82777981114kyebi.pdfIn PDF document text
    • http://jilet2.club/best_c_compiler_for_android_phoneurjuj.pdfIn PDF document text
    • https://cdn.sqhk.co/fuluniziwav/vigCAjd/clavinova_piano_dimensions.pdfIn PDF document text
    • http://gusanod.22web.org/99195451263.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486748/normal_5fd7803ec46ff.pdfIn PDF document text
    • https://cdn.sqhk.co/kugefiruxat/whivBgd/40046259819.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456369/normal_6006d074c1b6f.pdfIn PDF document text
    • http://cupe1.ru/rutusazizil2ezzd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498868/normal_5fdfa9727a2fb.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/sinamozagemoger/neluvap.pdfIn PDF document text
    • http://fezekugagow.rf.gd/website_file_er_chrome.pdfIn PDF document text
    • https://s3.amazonaws.com/dozore/rationalizing_imaginary_denominators_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/sogovekevi/battlefield_bad_company_3_android.pdfIn PDF document text
    • https://s3.amazonaws.com/mizeteb/piwuranerezadowod.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_off0000b65f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB65F 5852 bytes
SHA-256: deebbff4f5c34e9778b0db7ab2a919192edcf6384f3b310de6f4734797a73af9
font_01_sfnt_off0000ca47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA47 8992 bytes
SHA-256: 73cbb9c0efdfd117946bef23bcab884a23dc098133715b4a07c8c34270f0f301