Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba47c4d02f4e364a…

MALICIOUS

PDF

73.6 KB Created: 2021-02-07 20:59:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 14ffdf2fc6a926b0ece785689b9d26fb SHA-1: 4ddcef522ed4023a9f104a5d31f9b3f9ff03588e SHA-256: ba47c4d02f4e364a63237ef6ffd4944d6deb143b6919da2102792a267ffa2487
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://druttle.ru/wb?keyword=etiology%20of%20alzheimer PDF link annotation
    • http://erogan-oficial.site/antiquated_pronunciation_guidedezjk.pdfIn PDF document text
    • http://optarfes.com/blue_formal_shoes_suede7ly9b.pdfIn PDF document text
    • https://jigugelelatowo.weebly.com/uploads/1/3/1/4/131437208/xedigetil.pdfIn PDF document text
    • https://gufakapefevem.weebly.com/uploads/1/3/5/9/135994046/5228022.pdfIn PDF document text
    • https://degusatujetuz.weebly.com/uploads/1/3/0/8/130813325/wukeb.pdfIn PDF document text
    • https://lisiruzefixa.weebly.com/uploads/1/3/4/4/134495270/398730.pdfIn PDF document text
    • http://bigswinner.space/jeroroftuam.pdfIn PDF document text
    • https://druttle.ru/wb?keyword=etiology%20of%20alzheimer'%20s%20disease%20pdfPDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/paxuvagal/7965018542.pdfIn PDF document text
    • https://s3.amazonaws.com/bovenotojitowe/anatomy_rabbit.pdfIn PDF document text
    • https://s3.amazonaws.com/nezanurugega/93472358023.pdfIn PDF document text
    • https://s3.amazonaws.com/pobixedele/68334468116.pdfIn PDF document text
    • https://s3.amazonaws.com/fakuguvil/83152564356.pdfIn PDF document text
    • https://s3.amazonaws.com/novipaliwid/15858709118.pdfIn PDF document text
    • https://s3.amazonaws.com/wuvepilamamuse/sentiment_analysis_twitter_report.pdfIn PDF document text
    • https://s3.amazonaws.com/legesiliv/xifofanamamuzasawix.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_off0000e2f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2F5 5596 bytes
SHA-256: 3f2951cbdc6bf7df851cf477184d86f4e86b0f28e8df32b14d5fafb81c3da569
font_01_sfnt_off0000f5f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5F7 10436 bytes
SHA-256: a4e03a896e6c77b6c4d6674e2307123404f00e4163f8ba3b8c00b17837fbd144