Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b43ee816fc9c8b1…

MALICIOUS

PDF

82.3 KB Created: 2021-02-16 09:13:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 6ef1b4f80bd1537429c283bd15f108d1 SHA-1: 5b7bb83f7a53d176757f5b72fc04612b6963a547 SHA-256: 6b43ee816fc9c8b16a72623b27153388e18b5f9fb9c8958967327f83a1133395
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://jottigo.ru/123?utm_term=why+is+in+flanders+fields+so+important PDF link annotation
    • https://cdn.sqhk.co/fuvebopeweb/BxkV4gf/colornote_app_android_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426813/normal_5fdfcf768f3a7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486221/normal_5ff86656d5413.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497079/normal_5feb168f7abea.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485927/normal_5fcd780f1c32b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387811/normal_5ff5bd80c57f1.pdfIn PDF document text
    • https://cdn.sqhk.co/juvebuzizej/hahbabD/82144364225.pdfIn PDF document text
    • https://cdn.sqhk.co/vagekoxes/iaqfugd/dugub.pdfIn PDF document text
    • https://cdn.sqhk.co/nuzinipaz/ig8g940/viral_video_cranberry_juice_fleetwood_mac.pdfIn PDF document text
    • https://cdn.sqhk.co/fiwujumejuf/A7TQjam/channel_nfl_game_tonight.pdfIn PDF document text
    • https://cdn.sqhk.co/vefomatakin/iapethe/vikekixuxufojodapojisok.pdfIn PDF document text
    • https://cdn.sqhk.co/lilomovetum/ifEMmjg/top_freedom_rock_songs.pdfIn PDF document text
    • https://cdn.sqhk.co/zofizitene/icgejby/jodode.pdfIn PDF document text
    • https://cdn.sqhk.co/wodabumamuv/ijjiLUG/electric_guitar_chords_online.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491426/normal_602ac0c660b1e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off000101ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101EE 5396 bytes
SHA-256: 8306de25fcbaca744b6dd5e6066ac74c45c2060c378d546e81dbfd07d2cfe7d6
font_01_sfnt_off00011431.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11431 12828 bytes
SHA-256: 5c1fd7f1b78a18ce687690c965a4813504f455dfd1b20393e1e47fa52d867bef