Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a95ebc640d557af…

MALICIOUS

PDF

95.3 KB Created: 2021-01-25 00:30:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 92a0a03b2b629ef8eecf080209b011bc SHA-1: 1f2e628cedaa91cb5bd424eaf4bc1bad0bbcec78 SHA-256: 7a95ebc640d557aff602bf83304482e9367253ace37432d1e91248ecd4dd75de
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://crophysi.ru/wb?keyword=marketing%20advertising%20strategy%20services In PDF document text
    • https://static.s123-cdn-static.com/uploads/4382614/normal_5fe3225331c93.pdfIn PDF document text
    • http://harkateine.fun/gobojire7pb.pdfIn PDF document text
    • https://cdn.sqhk.co/bitaxukezor/Ojxjbgg/bowflex_black_friday_deals.pdfIn PDF document text
    • https://cdn.sqhk.co/seworani/u3gc3gd/traffic_racer_mod_apk_old_version.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450256/normal_5fe12b2f2782b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469638/normal_5fe611c705cfb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456712/normal_5fe0001537f2a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383806/normal_5fd7461c5660b.pdfIn PDF document text
    • https://cdn.sqhk.co/sawibevas/gpBjeqj/15865723963.pdfIn PDF document text
    • http://sidanixom.22web.org/gewitunedenewusef.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369771/normal_60035283f07ad.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://magajavopisili.epizy.com/p_g_practice_test_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/jepavilutabilel/jekiwevaxuwonenavosinovin.pdfIn PDF document text
    • http://lemujiv.epizy.com/bashment_12_by_dj_bash.pdfIn PDF document text
    • https://s3.amazonaws.com/kelageketisefuv/49568494723.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_off000137b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137B8 5304 bytes
SHA-256: 34dee2a92c45994cdfed39ce2f20e89f1a073d453726c43e647c825ca9ce5576
font_01_sfnt_off000149f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149F7 11240 bytes
SHA-256: d6b5bd2ae764f9c53ae8c9ce5a89db8d1e71b53b0d0d817d84f9482df8903fd6