Malicious PDF — malware analysis report

Static analysis result for SHA-256 544a70a99d6d7b08…

MALICIOUS

PDF

72.7 KB Created: 2021-02-20 09:01:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 22d575f97c045d3b44723a48f93b81ac SHA-1: 7d8d357cc7adc6dd22ef1998923bf59a4a7cc835 SHA-256: 544a70a99d6d7b08b5bc41e5e6065f7b7b5419219ee2022bfc2b81781ae506a7
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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=blackmart+apk+app+for+pc In PDF document text
    • http://steblin.pro/arithmetic_reasoning_questions_answers2yiwt.pdfIn PDF document text
    • http://heartcenteredequestrian.com/pomaxopumedidavelilipoxilq3d9s.pdfIn PDF document text
    • http://wusejopajaxus.22web.org/notutiz.pdfIn PDF document text
    • http://alsamcctv.com/28627395346yy8z0.pdfIn PDF document text
    • http://reduslim-italiaofficial.site/77045995115t9v3x.pdfIn PDF document text
    • http://copyright-central-media.com/bojuvipisovoxupasoxowe6bcas.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427076/normal_60062b5a258c6.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://tokiwubamiwi.rf.gd/firefox_older_version_for_windows_7.pdfIn PDF document text
    • https://s3.amazonaws.com/varoximu/sadavumipatotujefaje.pdfIn PDF document text
    • https://s3.amazonaws.com/suximawo/4972809005.pdfIn PDF document text
    • https://s3.amazonaws.com/wupixufekijax/72269351104.pdfIn PDF document text
    • https://s3.amazonaws.com/xaliwalufoguni/lowunofegumuzevugaroz.pdfIn PDF document text
    • http://pafafobovixezat.epizy.com/28935059046.pdfIn PDF document text
    • http://fefisapuvekebi.epizy.com/mbbs_books_quora.pdfIn PDF document text
    • https://s3.amazonaws.com/genijusemu/call_of_duty_mobile_apk_google_play.pdfIn PDF document text
    • https://s3.amazonaws.com/gosete/deep_fitted_sheets_double_size.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d561.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD561 4612 bytes
SHA-256: e927e8bd781a36f58262126a38ceabec9972bd6ff121c0fafc1597895b520d7b
font_01_sfnt_off0000e507.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE507 10276 bytes
SHA-256: 85dec6e061aae3293ed6d6d3a6ebe4bcbbb9de30c19929cbdd472285190d27b2
font_02_sfnt_off00010837.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10837 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2