Malicious PDF — malware analysis report

Static analysis result for SHA-256 a995792e9a6f2318…

MALICIOUS

PDF

71.3 KB Created: 2021-03-04 03:15:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 7d792c23c6e42f0102813553939d8b3e SHA-1: bc439b2ee2f11fb6b67776e1dcfa7b96653e10d3 SHA-256: a995792e9a6f23185d333cb57d65a3f969bbf10e6501c20abbb1728bd841a6e9
196 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.
  • 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://bologen.ru/award?keyword=saeco+coffee+machine+instruction+book PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4418558/normal_5fdff0d772d3f.pdfIn PDF document text
    • http://xamawigokoke.mygamesonline.org/what_are_the_components_of_mise-en-scene.pdfIn PDF document text
    • https://nalabusapigo.weebly.com/uploads/1/3/2/7/132740218/dapoxopenetetipiw.pdfIn PDF document text
    • https://cdn.sqhk.co/pemoxeriko/xtsielB/train_and_rail_yard_simulator_game_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392666/normal_602f5e50daf0d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426812/normal_5fd66dd0dba91.pdfIn PDF document text
    • https://cdn.sqhk.co/jobiwokojo/hdjgMvu/lonapojozajivubisoka.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484356/normal_5ff0668c4fcd9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405193/normal_5fdf33207cbdc.pdfIn PDF document text
    • https://zedasadexim.weebly.com/uploads/1/3/0/7/130775923/fokibedejadolaruliv.pdfIn PDF document text
    • https://zufefofavenubu.weebly.com/uploads/1/3/0/7/130775539/berewaneke.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452862/normal_5fc6af2dbc4d9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455876/normal_6005dbb97f7e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476750/normal_602a21fb30dfb.pdfIn PDF document text
    • http://duwosolutanuz.mypressonline.com/sawepifimajuzevemifijo.pdfIn PDF document text
    • https://pipamoximiketo.weebly.com/uploads/1/3/0/9/130969724/8264658.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464521/normal_6028f52c2827b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413019/normal_601a7fd5dad9f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD36 5280 bytes
SHA-256: 89fb2fca70486589db5726d6a1f5c7e034e28b57b3b646bf83ddba734137e691
font_01_sfnt_off0000def6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEF6 10220 bytes
SHA-256: 0bd023b15ddfdf72d4dce327b98383177110343a41c6207c701a914d55cf24a5
font_02_sfnt_off000101ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101EF 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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