Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa9c3a25e08a846c…

MALICIOUS

PDF

68.7 KB Created: 2021-02-15 04:55:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 6a910fe652ea74bf1ab97a8077431955 SHA-1: 3d5dd9d93b7961819618bad6098a463700dc8029 SHA-256: fa9c3a25e08a846cddd8e69e0efb15b1dd207c55e458367d3e8b57cf5cf3b237
262 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wb?keyword=ayatul%20kursi%20%20mp4 In PDF document text
    • https://sexevegafuxa.weebly.com/uploads/1/3/6/0/136083832/2103260.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417662/normal_5fcbfe2ec69f2.pdfIn PDF document text
    • https://vigodabazo.weebly.com/uploads/1/3/4/8/134872933/28b30.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392439/normal_6025eed5836d8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386591/normal_5ff66a5735f03.pdfIn PDF document text
    • http://klossheff.xyz/sissy_maker_game_guidep0mtv.pdfIn PDF document text
    • https://bamususifilozok.weebly.com/uploads/1/3/1/3/131383301/jufenujunux.pdfIn PDF document text
    • http://7lessons.space/xiriporudowalubetalamilqfmdg.pdfIn PDF document text
    • https://guvijubeb.weebly.com/uploads/1/3/5/3/135318684/kanepisuv.pdfIn PDF document text
    • http://tortomsk.ru/kugoridonuxuditexowelejz2djz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463785/normal_5fe466457c7ac.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/xezonijida/renaissance_periodization_hypertrophy_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zulezov/85803967018.pdfIn PDF document text
    • https://s3.amazonaws.com/wavunot/kinship_viability_assessment_template.pdfIn PDF document text
    • https://s3.amazonaws.com/xuvamuba/capricho_arabe_piano.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_off0000d047.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD047 5208 bytes
SHA-256: 2be76b15056b29aa79b76c7bc19efc129fed255c3727f5a9f190eedc7353864f
font_01_sfnt_off0000e1fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1FA 10784 bytes
SHA-256: 05bc2fecb38c225eefa55fab0c86a999ff0da7886c45a385e6968a3bff3d58f4