Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dc791320bc89de4…

MALICIOUS

PDF

65.7 KB Created: 2021-02-12 05:28:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 374b2a2c9dc41bb9bba4a00c5ac9be68 SHA-1: d8979297a716718b7143778c383e79fe22e51438 SHA-256: 2dc791320bc89de4b311f94cf748bd23ccc84a218ff97a4229c06dc3760aa31b
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://crophysi.ru/wix?keyword=translations+worksheet+answers+math+aids In PDF document text
    • https://cdn-cms.f-static.net/uploads/4461205/normal_5fd9364652eb6.pdfIn PDF document text
    • https://cdn.sqhk.co/bipufawawi/wwpjghb/tekega.pdfIn PDF document text
    • https://cdn.sqhk.co/pilozarager/bvXYfL3/police_drift_car_driving_game.pdfIn PDF document text
    • https://cdn.sqhk.co/sezunofubuzi/aghhiJB/gatemexagedil.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365598/normal_5fde9d7236e78.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488335/normal_60252cea1b74e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454678/normal_5fdec655386c7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385011/normal_5fddc12598e7d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454545/normal_5ff6bdde7f568.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/lodazojamuva/blank_avery_5160_template_for_word.pdfIn PDF document text
    • https://s3.amazonaws.com/jazofi/11684384704.pdfIn PDF document text
    • https://s3.amazonaws.com/xurixado/mijavimezanudexer.pdfIn PDF document text
    • https://s3.amazonaws.com/sizabo/97887971917.pdfIn PDF document text
    • https://s3.amazonaws.com/pokorevalaxex/extent_reports_are_not_getting_generated.pdfIn PDF document text
    • http://ninonasoligu.rf.gd/62161193964.pdfIn PDF document text
    • https://s3.amazonaws.com/vifusupegiza/roasted_chicken_nutrition_information.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_off0000c750.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC750 5168 bytes
SHA-256: 623e92236e5d417067f504cac7d812368580e402cdb29a631da45d841f075fd8
font_01_sfnt_off0000d8c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8C5 9736 bytes
SHA-256: 418cadd7ad24fdc49974dc092119286bab55dc1fe50260f1b0c9cdda561d8e6e