Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a7d90b2068dcb51…

MALICIOUS

PDF

68.8 KB Created: 2021-02-20 01:16:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: d6ed25a99c8c3836366351e88d29f441 SHA-1: b86f922c3022a6afc17b6a2b3a2db160114716d2 SHA-256: 7a7d90b2068dcb51ed1a02b5dc6d12045ab408fbd03a84e642cda409a9b20b44
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=why+do+smoke+detectors+flash+red PDF link annotation
    • http://litamomun.22web.org/cartoon_video_calling.pdfIn PDF document text
    • https://cdn.sqhk.co/bikegola/gijfifX/begelo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377936/normal_6003e36b766f4.pdfIn PDF document text
    • https://cdn.sqhk.co/zururodi/hogf0jj/sazuganutobotivovija.pdfIn PDF document text
    • https://cdn.sqhk.co/vopiruwikil/Qibidha/75146510323.pdfIn PDF document text
    • https://cdn.sqhk.co/fovipobex/rihcogd/fapawudukofezewiboloki.pdfIn PDF document text
    • https://cdn.sqhk.co/wazilisiko/pw9gfc6/notification_ringtone_download_mp3.pdfIn PDF document text
    • https://cdn.sqhk.co/doxowite/geBBhjH/videzojutusakituges.pdfIn PDF document text
    • https://cdn.sqhk.co/xunijejozi/djciajJ/75299629211.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413013/normal_5fdc259c68246.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/jarirotexab/40068910838.pdfIn PDF document text
    • https://s3.amazonaws.com/sinadi/6655310343.pdfIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/arifureta_novela_completa.pdfIn PDF document text
    • https://s3.amazonaws.com/debiwelof/78359067420.pdfIn PDF document text
    • http://tokipobobanokab.rf.gd/fusenusegejikabawawomu.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_off0000d1a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1A8 5440 bytes
SHA-256: 00470ecaa47c2b32b433e43ba68c535c297a04f58433599d696e0606bb696f6d
font_01_sfnt_off0000e412.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE412 10140 bytes
SHA-256: c10862c30b5557adf94afcae11dc2a60b64bcf025c1fec2a521ee3e1c878da99