Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e0cfffa4c79b4bc…

MALICIOUS

PDF

68.7 KB Created: 2021-02-06 12:02:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 4f54e62e368415d437a59d57e7310c5a SHA-1: ecc7c0fe805c70d5ad8d368ed0d4879d1a14441b SHA-256: 6e0cfffa4c79b4bcdbbd4237f556401fe0d818a5e29f67d32bef571ac03e19f4
194 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
  • 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.
  • 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.
  • 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://yafferge.ru/wb?keyword=carlos%20alberto%20brilhante%20ustra%20pdf In PDF document text
    • https://static.s123-cdn-static.com/uploads/4450506/normal_5fec73f2a4307.pdfIn PDF document text
    • http://natnat.fun/vyprvpn_server_lista3b2i.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414489/normal_600765cd8d1b6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443357/normal_5fe0d31a4a4d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390663/normal_60134b05ee9bc.pdfIn PDF document text
    • https://cdn.sqhk.co/dofofoziga/Phhzgc8/family_zoo_the_story_mod_apk_terbaru.pdfIn PDF document text
    • https://cdn.sqhk.co/pavujakorige/jj9iijj/crayola_outline_markers_uk.pdfIn PDF document text
    • https://cdn.sqhk.co/gulanuwe/acE1Hjf/animal_sound_generator_ic.pdfIn PDF document text
    • https://cdn.sqhk.co/lijipatalenu/iiiemjj/ninja_foodi_grill_recipes_youtube.pdfIn PDF document text
    • https://cdn.sqhk.co/didozakir/idNagjf/janor.pdfIn PDF document text
    • https://cdn.sqhk.co/javeduner/did3931/9122524983.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368246/normal_5fcc839de4d13.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392860/normal_60128f8e94531.pdfIn PDF document text
    • http://f13x.xyz/misoxunupefasotu1jdh.pdfIn PDF document text
    • https://cdn.sqhk.co/rabawula/Y6i6ibw/trending_hashtags_on_instagram_for_likes.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/zugutixe/zojek.pdfIn PDF document text
    • https://s3.amazonaws.com/bevekizadoxuj/xudexesuxomovijirewes.pdfIn PDF document text
    • https://s3.amazonaws.com/wufujudisu/zukikepixivegowopejoloj.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_off0000cd29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD29 5176 bytes
SHA-256: 664c267330c92a96442cf1fea5a5f59f01b3ffc293065868ee5f9be7c570da74
font_01_sfnt_off0000deb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEB0 11448 bytes
SHA-256: 8f7dc96bb71a23bd5aa44c82b0f4227596476fc4781fa8f5adde9344c1eab531

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