Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bbe58988582544f…

MALICIOUS

PDF

69.8 KB Created: 2021-02-16 14:07:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: c0dbc665bab0390770058fd2c818db57 SHA-1: 65c0e051d53fe8a0c041088588c59b60bbc47bd9 SHA-256: 9bbe58988582544feeeab8d083a37a63820c836a3439823d9c0a6c5f234b53ce
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/123?utm_term=explain+whether+kno3+is+polar+ionic+or+nonpolar PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4446651/normal_5fda13a6f06ff.pdfIn PDF document text
    • https://pufukowog.weebly.com/uploads/1/3/4/5/134583281/1069404.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372074/normal_601fe53b63399.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451033/normal_5fd7f3dc08b4a.pdfIn PDF document text
    • https://mamowolo.weebly.com/uploads/1/3/4/7/134714390/3d3049a050c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402519/normal_601cef78d311c.pdfIn PDF document text
    • http://konobemozitu.iblogger.org/80343314509.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496607/normal_601b50474878a.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/vexosafugunu/fetal_pig_digestive_system_diagram_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/dukexajuj/vosugikufugiv.pdfIn PDF document text
    • https://s3.amazonaws.com/damerirazib/luigi_s_mansion_theme_sheet_music.pdfIn PDF document text
    • http://tejogasev.rf.gd/gifidabume.pdfIn PDF document text
    • https://s3.amazonaws.com/gimufesajo/en_liftares_guide_till_galaxen_film.pdfIn PDF document text
    • https://s3.amazonaws.com/rilexazejuzovep/natal_birth_chart_report_free.pdfIn PDF document text
    • http://zirivog.rf.gd/38933226726.pdfIn PDF document text
    • http://sonunujudul.rf.gd/tufonoj.pdfIn PDF document text
    • https://s3.amazonaws.com/gelawiweza/vidmate_free_oldest_version.pdfIn PDF document text
    • http://nobudusoselazo.epizy.com/taxenukatonosozoregepis.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_off0000d010.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD010 5364 bytes
SHA-256: 6662db09e729e9be635996ae2b396051e795a06b3e6afa6264527b325fad842f
font_01_sfnt_off0000e264.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE264 11172 bytes
SHA-256: 6899ef43686a0cbe16c63aa269b42ee67d7da48dcd107bf3a2841dcb2bd14d3b