Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3d5369f9f58a167…

MALICIOUS

PDF

71.2 KB Created: 2021-02-15 07:37:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 59468a07acafa182e3ddf1b942d03725 SHA-1: eef92f65901645767a496619e99e1bce434538aa SHA-256: f3d5369f9f58a1677483369d08fd7391092d2ad56337e93ed88e92cf76b5e2ae
204 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://druttle.ru/wix?keyword=spanish+lab+answers PDF link annotation
    • https://felekiki.weebly.com/uploads/1/3/4/6/134689652/niluxezigowumikap.pdfIn PDF document text
    • https://zolujalu.weebly.com/uploads/1/3/1/8/131856956/bakoruwenib-sabesire-pusorelij-tutuzuwikikim.pdfIn PDF document text
    • http://wibagimapo.22web.org/gitodes.pdfIn PDF document text
    • https://lemefiware.weebly.com/uploads/1/3/4/0/134017231/gevumafawaz.pdfIn PDF document text
    • https://lipopujowojirew.weebly.com/uploads/1/3/1/4/131408954/jufosuboxegut-fewasizojawi-dolofelurixef-doligikazoro.pdfIn PDF document text
    • https://vewawunazesova.weebly.com/uploads/1/3/5/3/135314918/luzoxifesobajip.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sewesomepajava.epizy.com/nopiduxuwekekumopute.pdfIn PDF document text
    • http://bufivuz.rf.gd/nibejafagelogut.pdfIn PDF document text
    • https://s3.amazonaws.com/sefiwegegagu/videos_online_iphone_app.pdfIn PDF document text
    • http://gokujipavelidaz.rf.gd/jivewela.pdfIn PDF document text
    • https://s3.amazonaws.com/goneduzum/57472809164.pdfIn PDF document text
    • http://vokulokunupada.epizy.com/8470599493.pdfIn PDF document text
    • https://s3.amazonaws.com/ladojenefe/brawl_stars_mod_android_1.pdfIn PDF document text
    • http://noxagipuputop.rf.gd/guvuderagipaxugilolenev.pdfIn PDF document text
    • http://botovomevagexe.epizy.com/wuwoliku.pdfIn PDF document text
    • https://s3.amazonaws.com/jukoxisojow/23608706001.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_off0000dbb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBB4 5244 bytes
SHA-256: 83685a91a2fb4b53117174e46f3856dcd2f9b250321fb2fa613108ec1727cff6
font_01_sfnt_off0000ed8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED8B 10016 bytes
SHA-256: c6fa5b8dbd9aa4638e3bc5044e9a5fb48054deb2a1aac0f3f8948e080117e2b2