Malicious PDF — malware analysis report

Static analysis result for SHA-256 2af63b23bf348c12…

MALICIOUS

PDF

73.7 KB Created: 2021-02-20 04:48:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 6c3b7ec5827978633116b27cefd30b42 SHA-1: 41c418ea31650254cabd8d7f8b73a61cdaeda1e1 SHA-256: 2af63b23bf348c12dbe903d705bc799f46bcc71ee2d24ca9d6ac9111abeea32f
262 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/wix?keyword=contents+of+the+dead+man%2527s+pocket+four+levels In PDF document text
    • https://cdn.sqhk.co/jezuleku/jb7d0ig/31362957852.pdfIn PDF document text
    • https://cdn.sqhk.co/manuguwe/iiR6ggw/jumuzixo.pdfIn PDF document text
    • http://vorecan.space/27580295983mxko0.pdfIn PDF document text
    • https://cdn.sqhk.co/pufuxarabo/hbijig1/photos_camera_hd_for_instagram.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427528/normal_602525829912b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420765/normal_5ff393d7ded2f.pdfIn PDF document text
    • https://bibokesoxi.weebly.com/uploads/1/3/4/8/134850131/fitugu.pdfIn PDF document text
    • https://cdn.sqhk.co/rasepotobami/dhcysJb/73214064115.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462362/normal_5fe909ae9599a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383928/normal_5ff3bd711a18d.pdfIn PDF document text
    • https://marikiwow.weebly.com/uploads/1/3/1/3/131379510/tefebavapetap.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389804/normal_5fe6260b8f597.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481280/normal_5fd04a0b32874.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/kuboki/caca_niquel_halloween_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/jupevuxirapi/tigokulovebudubimexewol.pdfIn PDF document text
    • https://s3.amazonaws.com/kelageketisefuv/45530161722.pdfIn PDF document text
    • https://s3.amazonaws.com/didowugorokirug/tivuv.pdfIn PDF document text
    • https://s3.amazonaws.com/rumezo/jalugebezisumo.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_off0000e437.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE437 5460 bytes
SHA-256: 5cc75f6b421c94115bec7f0f4412e5a03762a7e613bebd7c191d51e02bcdbc0a
font_01_sfnt_off0000f6a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6A7 10160 bytes
SHA-256: 00f4ce25026a027b58be07bee09538806a1c775a5d83ba46ad600e325c6be6f1