Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae74e20988edd1f4…

MALICIOUS

PDF

73.0 KB Created: 2021-02-13 21:38:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 1f28bc6fb7c7755bfab7ae0601ba6b7e SHA-1: e43367dc0cf065a0690084377a52d64ceda8c465 SHA-256: ae74e20988edd1f4e393d7bb4cd1589a30ab68d0db4fb3cd78c2fc8e03f74e06
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/wix?keyword=gruesome+playground+injuries+full+script+pdf In PDF document text
    • https://kodabovoxalomas.weebly.com/uploads/1/3/5/3/135340354/batoto.pdfIn PDF document text
    • https://cdn.sqhk.co/vivepovugeli/dZfhiM5/spongebob_moves_in_glitch.pdfIn PDF document text
    • http://gabubixaj.22web.org/adidas_supernova_shorts_size_guide.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/fajonubinomeder/vojivu.pdfIn PDF document text
    • https://s3.amazonaws.com/zukogi/act_practice_reading_test_3_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/zoluwivebiro/emotional_songs_bollywood.pdfIn PDF document text
    • https://s3.amazonaws.com/gogonof/provinsi_banten_dalam_angka_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/dazovosugev/volipetibatuwunenivan.pdfIn PDF document text
    • https://s3.amazonaws.com/lupebesu/blank_cursive_writing_practice_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzumeb/ada_guidelines_2018_ppt.pdfIn PDF document text
    • https://s3.amazonaws.com/satulibaren/xatojuled.pdfIn PDF document text
    • https://s3.amazonaws.com/wuvepilamamuse/70204337652.pdfIn PDF document text
    • http://jitikatul.rf.gd/apostrophe_worksheets_for_grade_3_with_answers.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_off0000e0a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0A2 5684 bytes
SHA-256: e0247e7e81ed4a659e68392b13a1f6dbbae6a23d99f2089b3fe00ae0f727629b
font_01_sfnt_off0000f3f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3F5 10260 bytes
SHA-256: 35d80ea9b892af6cfee775fd79652e6bd34da371fead7c3e38cab31611dd60cf