Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8898cb353c5318d…

MALICIOUS

PDF

67.0 KB Created: 2020-10-29 01:07:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-02
MD5: 4b2b60ed8d1797273579ad9211e5c384 SHA-1: 40b2799733a3e84b434be7f2440a38902cdd5240 SHA-256: e8898cb353c5318df48820d32b610826363c860d093f90d0bbe23d85c68ebe5b
234 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://ttraff.me/pify?keyword=prem+ratan+dhan+payo+movie+download+free In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365583/normal_5f874b7932c00.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381964/normal_5f8fb1a4a294d.pdfIn PDF document text
    • https://wuwenivavubujer.weebly.com/uploads/1/3/1/4/131437756/1453155.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374178/normal_5f8d2740d06ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382948/normal_5f96b577db3d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387929/normal_5f901e5210d68.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374519/normal_5f8953ac8ad1a.pdfIn PDF document text
    • https://porelananov.weebly.com/uploads/1/3/0/7/130775759/voreneb-pejulusi.pdfIn PDF document text
    • https://lozulijulejibog.weebly.com/uploads/1/3/1/8/131857057/20f8c96ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379837/normal_5f99a1fda81ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369185/normal_5f98e077df999.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392210/normal_5f964825d89f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385612/normal_5f99ea39d27f1.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00007eca.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00007eca.bin)
    • http://www.daltonmaag.com/In extracted file (font_03_sfnt_off0000ef7f.bin)
    • https://s3.amazonaws.com/vidadaviwal/basic_antenna_theory_and_concepts.pdfIn PDF document text
    • https://s3.amazonaws.com/zerepuzuze/d20_modern_blood_and_guts.pdfIn PDF document text
    • https://s3.amazonaws.com/bidivo/nukuzigarij.pdfIn PDF document text
    • https://s3.amazonaws.com/potofaw/acoustic_guitar_fingerstyle_tabs.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/japibemul.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/4545740298.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 extracted file (font_00_sfnt_off00007eca.bin)
    • http://sinhala.sourceforge.net/In extracted file (font_01_sfnt_off00008fe8.bin)
    • http://sinhala.cvs.sourceforge.net/viewvc/*checkout*/sinhala/sinhala/fonts/CREDITSIn extracted file (font_01_sfnt_off00008fe8.bin)
    • http://www.gnu.org/licenses/gpl-2.0.htmlIn extracted file (font_01_sfnt_off00008fe8.bin)

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007eca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7ECA 5144 bytes
SHA-256: 11c2a7694f46dec15500f365bd66166e835921bd59af2f2d6f462e588c81d75f
font_01_sfnt_off00008fe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FE8 23120 bytes
SHA-256: aea222f9e642487958017c9ac65ea449294d1f163913459af554183c0baff9b1
font_02_sfnt_off0000c83e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC83E 12356 bytes
SHA-256: 2e17e57907a4b3d82988eb79b343a4f060b8929827e785fc02e1c8fb98f3c919
font_03_sfnt_off0000ef7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF7F 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176