Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2e829a3f298dea0…

MALICIOUS

PDF

69.3 KB Created: 2021-02-12 08:50:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 8ac0c8c96b9981fe2e7ef482365bb5b9 SHA-1: f637b344974de34957805003e77a751279be2abc SHA-256: a2e829a3f298dea034a9ccc688e374c7aeb1fa1bd946642206510d285ae9407b
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://jacksth.ru/123?utm_term=the+broken+eye+review PDF link annotation
    • http://monstergym.ru/ascaris_lumbricoides_cdcbjc5t.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365539/normal_60036ed92a429.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418583/normal_5ff9c60dbfff4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410222/normal_5ff3ea416ce30.pdfIn PDF document text
    • http://henrysavbr.site/zalemnu4lk.pdfIn PDF document text
    • https://cdn.sqhk.co/wujamufaw/geifNih/zivugemisizub.pdfIn PDF document text
    • http://50offshop.info/82844666414w1hf1.pdfIn PDF document text
    • http://repair-planshetov.ru/behavior_contract_for_teenagertfmkx.pdfIn PDF document text
    • http://wokelegekak.66ghz.com/wozomibibusaxijawuteta.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485001/normal_601a13a4abf6a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461205/normal_6003655c31111.pdfIn PDF document text
    • http://de-bewertung-id-q2e5t23.top/prentice_hall_united_states_historyvtdzu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407988/normal_5ff3020d5cbeb.pdfIn PDF document text
    • https://waruzakelejabu.weebly.com/uploads/1/3/4/6/134600446/xiluf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373004/normal_5fcb0120f0f02.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414847/normal_6014535ed67ad.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://padepivezaw.rf.gd/basic_anatomy_app.pdfIn PDF document text
    • http://wawutanow.epizy.com/atherosclerosis_biochemistry.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_off0000d4ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4CE 4760 bytes
SHA-256: 03c328d7bf16c0e414854e4392ce9e3d09a9be5f61afcb477fe4658463f7dc01
font_01_sfnt_off0000e510.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE510 10284 bytes
SHA-256: f96067185b4c85e4c36d2ffe1590033c26a4bf9ffd70ba9f6de1a099b2d5531e