Malicious PDF — malware analysis report

Static analysis result for SHA-256 15de00b16c336c13…

MALICIOUS

PDF

67.1 KB Created: 2021-02-17 23:08:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 19caa1bfd3b513f325661b6985de21c3 SHA-1: 42f20b9de1b2a04425f842e56e828ab52991c356 SHA-256: 15de00b16c336c1334e25f77a0d2d57248d18bf63e80f47a51c92681a4a643fb
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://jottigo.ru/wix?keyword=minireena+sister+location PDF link annotation
    • https://cdn.sqhk.co/jolodovi/jfheidO/xobivetovidegakonaw.pdfIn PDF document text
    • https://xonasuxodu.weebly.com/uploads/1/3/2/6/132681295/kugis.pdfIn PDF document text
    • https://cdn.sqhk.co/lidupusumoj/YDXkHgc/slither_io_hacks.pdfIn PDF document text
    • https://cdn.sqhk.co/fexejikexew/Cjicjhp/herpes_simplex_1.pdfIn PDF document text
    • http://bestita.space/a_movie_on_netflixwi52t.pdfIn PDF document text
    • http://creditinquiry.info/426935239634ywoy.pdfIn PDF document text
    • https://cdn.sqhk.co/futevanu/ig2OiYN/dubeterune.pdfIn PDF document text
    • https://cdn.sqhk.co/jesovolavig/jijghhb/tukukolororalobis.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://davixajo.rf.gd/tecumseh_10_hp_engine_repair_manual.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_off0000cd97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD97 4796 bytes
SHA-256: 95a24fd90a6a8667ad21c70cf981520293b9f89be28ba67a26e9c55312399c76
font_01_sfnt_off0000ddf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDF9 10084 bytes
SHA-256: cc1357fd22da756f64570b79aa925bf04c9b60623c04da250a17195c964d1726

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