Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0df13b53f4782b6…

MALICIOUS

PDF

70.4 KB Created: 2021-02-14 04:46:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 2dc0fd857738219a76ac54d3be377c94 SHA-1: 5037300b3efa2879b6457dd60f0f1ba7de6a310a SHA-256: a0df13b53f4782b68b9a2d07102b5bc2550a031965e90c278e5991c211639903
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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.
  • 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://baarspo.ru/wb?keyword=autodesk%20sketchbook%20brush PDF link annotation
    • https://tawatoxox.weebly.com/uploads/1/3/4/0/134018263/d30544044f43.pdfIn PDF document text
    • https://mokoluwi.weebly.com/uploads/1/3/4/5/134595511/1259981.pdfIn PDF document text
    • https://dasowafajego.weebly.com/uploads/1/3/4/7/134723411/daxoretavavewa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449172/normal_6000f27d07129.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479925/normal_5fe5986851dc1.pdfIn PDF document text
    • https://sinekagu.weebly.com/uploads/1/3/4/8/134855021/d1cde.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376850/normal_5fe2900808f09.pdfIn PDF document text
    • https://cdn.sqhk.co/zixedagiro/im9Nijy/galuzivuputa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465702/normal_5fd8165a57c32.pdfIn PDF document text
    • https://weralafopibobal.weebly.com/uploads/1/3/4/3/134338927/vazogadewowerap.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377663/normal_5ffa22e10c90a.pdfIn PDF document text
    • https://lagomumudalo.weebly.com/uploads/1/3/2/6/132681699/7126685.pdfIn PDF document text
    • https://cdn.sqhk.co/dolafita/eCmighj/mituxekajomadoximenumu.pdfIn PDF document text
    • https://dezegumi.weebly.com/uploads/1/3/4/1/134108828/rusewotik.pdfIn PDF document text
    • https://cdn.sqhk.co/zozijawutuxu/chghagh/study_skills_classes_for_middle_school_students.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://farujage.epizy.com/lirik_lagu_bunga_citra_lestari_kecewa.pdfIn PDF document text
    • http://repowibozedo.rf.gd/33041502483.pdfIn PDF document text
    • http://genufewewirim.rf.gd/pierro_astro_adc_manual.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_off0000d5de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5DE 4976 bytes
SHA-256: c6e597d5e34c67945442f2c937d93601ac423c2874163bfe4b25ac57ec33e7c5
font_01_sfnt_off0000e6c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6C8 12324 bytes
SHA-256: d58974775bf85e7963cc8dc7b2b442a6b8a9064ff24bd8559d92daf32a340cc7