Malicious PDF — malware analysis report

Static analysis result for SHA-256 13feefa3be662e90…

MALICIOUS

PDF

68.4 KB Created: 2021-02-11 22:07:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: beefcd062dc93c5475777a94fc3062cb SHA-1: 0cac177faa35c147da9bff975044ad239898e247 SHA-256: 13feefa3be662e9006511335b733ce72a1101366173e926879c721c0f8ab83ed
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/wix?keyword=periodic+trends+webquest+answer+key In PDF document text
    • http://jipujitematane.iblogger.org/17816218597.pdfIn PDF document text
    • http://logusubunovad.22web.org/84760855474.pdfIn PDF document text
    • http://waxawazurutane.22web.org/vanudubobezidagu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369491/normal_602416cbf2fcb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454306/normal_5ffa704a20f79.pdfIn PDF document text
    • https://redelonoxoti.weebly.com/uploads/1/3/1/6/131606094/3150203.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408584/normal_5fdf37f34df6f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494451/normal_5fffd06246130.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447251/normal_5fec7ddc9d8f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415739/normal_6019ac013d229.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475217/normal_601e3f0881359.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488135/normal_6011d02ee0bba.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://kavolimuteso.epizy.com/jotagopekarezerolobasa.pdfIn PDF document text
    • https://s3.amazonaws.com/xilasisefi/zimipuzalaruki.pdfIn PDF document text
    • http://vasikiga.epizy.com/utorrent_android_incoming_port_0.pdfIn PDF document text
    • https://s3.amazonaws.com/gekojulog/faluwukuvetefog.pdfIn PDF document text
    • https://s3.amazonaws.com/potamotaz/26624828315.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_off0000c1f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1F1 5308 bytes
SHA-256: 0c3a7993d5c6ca9ee0b0c3db1d99a1b3d3ec26aaae7cb740fba6e37ae45318c3
font_01_sfnt_off0000d418.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD418 10060 bytes
SHA-256: 4703990d6d8166b175d9593cff7056cc132425a1907b41c0d27a66a64f4349f6
font_02_sfnt_off0000f685.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF685 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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