Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7479d445efd32da…

MALICIOUS

PDF

72.0 KB Created: 2021-03-02 23:18:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 02b081cae6cd813983c94544ee739929 SHA-1: d773bf725ea25e8e75671dfa9b280b335b47fc6a SHA-256: b7479d445efd32daa552396e942ac65629769f19cfb907f726175d089f9ec7e4
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://druttle.ru/award?keyword=do+barbells+build+muscle PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4450256/normal_602fb93bac0e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462376/normal_5fda315751899.pdfIn PDF document text
    • http://lelekelosutov.getenjoyment.net/how_to_repair_nhs_hearing_aid.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385434/normal_5fefd3929266b.pdfIn PDF document text
    • http://idealicait.site/nozaluwaravufeboluxoginoaacb.pdfIn PDF document text
    • http://wujejejifi.mygamesonline.org/stealth_camping_roof_top_tent.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382976/normal_5fd163b800534.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/xubifupi/dearly_beloved_livro.pdfIn PDF document text
    • http://lidesesepaz.rf.gd/36625791616.pdfIn PDF document text
    • http://terujak.epizy.com/will_there_be_another_kane_chronicles_book.pdfIn PDF document text
    • https://s3.amazonaws.com/supefujoxopubu/31467331322.pdfIn PDF document text
    • https://s3.amazonaws.com/zugutixe/dagizozagusedutoduwelimiz.pdfIn PDF document text
    • https://s3.amazonaws.com/gurupixabogivaz/sobixisenarab.pdfIn PDF document text
    • http://weparaxopulo.atwebpages.com/hardest_maze_game_ever_online.pdfIn PDF document text
    • https://s3.amazonaws.com/nefunupu/munafuvalu.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_off0000de5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE5C 5224 bytes
SHA-256: 27d289af587ef1b6f7c2565c20dd486475168ade27e52b7c696f8082473a0f74
font_01_sfnt_off0000f007.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF007 10220 bytes
SHA-256: f3fb647462702037590bd94008fa64d11a65f3a31c000da6e7d5bb6cd55f0268