Malicious PDF — malware analysis report

Static analysis result for SHA-256 56b123c2bf61efbb…

MALICIOUS

PDF

72.0 KB Created: 2021-02-01 08:55:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 5e76a4b670a441fd9de65868328fa93d SHA-1: 74ef56056bb1b47eb92a0d3b979c43d68cfc1e8d SHA-256: 56b123c2bf61efbbf12c5b191fabbf045552bd8230f2f6e3ba04d1cb1073f93e
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafffe.ru/wb?keyword=alchemy%20symbols%20and%20meanings%20pdf PDF link annotation
    • http://xviiivbgz.com/99160891404ei2wa.pdfIn PDF document text
    • http://whalesqpa.fun/modern_3_bedroom_house_plansg9z8c.pdfIn PDF document text
    • http://normaa-id.com/firmware_1.05_qviart_undro_4kmq25v.pdfIn PDF document text
    • https://nogonosexenepe.weebly.com/uploads/1/3/4/6/134674491/7a5a0b49667f00.pdfIn PDF document text
    • https://kagivosivozavex.weebly.com/uploads/1/3/4/7/134746508/kazisoxeb.pdfIn PDF document text
    • https://dafufiwe.weebly.com/uploads/1/3/4/3/134368649/fadaxuwoxuvuj.pdfIn PDF document text
    • https://gupuvuzuguzi.weebly.com/uploads/1/3/1/3/131379578/2222780.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449603/normal_5fca6565c64cb.pdfIn PDF document text
    • http://help-verification.com/tevemokedifulopojcb.pdfIn PDF document text
    • https://dokegofixak.weebly.com/uploads/1/3/0/8/130873830/b7c125c402e823a.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/zesotat/shooting_star_bag_raiders.pdfIn PDF document text
    • https://s3.amazonaws.com/genedesowul/google_chrome_78._0.pdfIn PDF document text
    • https://s3.amazonaws.com/rizezobabub/netbeans_for_jdk_12._0._2.pdfIn PDF document text
    • https://s3.amazonaws.com/fejififimaketo/a_bug_s_life_full_movie_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/retobifulipo/81337888882.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_off0000dc70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC70 5704 bytes
SHA-256: 56c2f0f89fe0f02a7ffce82ae4c7f2892f4bb3a0df92029c14dd11b500265379
font_01_sfnt_off0000efc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFC6 10456 bytes
SHA-256: 49ab93b2060484419e878c7c4adc8e5ef0d732ecfedb417ba6f6b36dfe4cbe6f