Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d89c63a05ab91e1…

MALICIOUS

PDF

71.9 KB Created: 2021-02-02 17:13:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 8f3feb5470487f52b116837881cfb532 SHA-1: b185971a13553e185b83fbb0f955919efa176fea SHA-256: 7d89c63a05ab91e16e9c8bf2f7078edd158688e2ab3e48eb3f4abd04c6171172
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://seumenha.ru/wb?keyword=epfo%20online%20claim%20form%2010c PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4379035/normal_60085e3e920b5.pdfIn PDF document text
    • https://cdn.sqhk.co/fuwunikuneg/yiipCic/besujimegukisivuxo.pdfIn PDF document text
    • https://pexajutamog.weebly.com/uploads/1/3/4/7/134759810/8933564.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450504/normal_600888b353e98.pdfIn PDF document text
    • https://dusibijerike.weebly.com/uploads/1/3/2/6/132695870/6046f5c00ec.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482847/normal_5fc7f27cceb1b.pdfIn PDF document text
    • https://pazunorafozide.weebly.com/uploads/1/3/0/7/130776571/921e7462cef8.pdfIn PDF document text
    • https://dasukixarukawo.weebly.com/uploads/1/3/2/8/132814138/8682923.pdfIn PDF document text
    • https://cdn.sqhk.co/puberufibo/jCzig2f/cheap_strikers_1945_classic_uptodown.pdfIn PDF document text
    • https://nadaroxiwe.weebly.com/uploads/1/3/4/6/134688146/4a865311c53293.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383340/normal_600306584a473.pdfIn PDF document text
    • https://cdn.sqhk.co/nizekidido/ipje2hj/43512232260.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486971/normal_5fe6367697308.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/vonuxagupeduze/23339684662.pdfIn PDF document text
    • https://s3.amazonaws.com/sigobija/fepire.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_off0000ded0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDED0 5132 bytes
SHA-256: a63664e5d905c0dd95cdbccb2f09afc5273405a87339cdcb64f3fb164f399b3f
font_01_sfnt_off0000f038.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF038 10136 bytes
SHA-256: 0fbaf80cfc600bbe4857d23c0f5d658cfa1987b382f4a11b0f428f8bb0de58d1