Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3f69c684b0d55a6…

MALICIOUS

PDF

63.1 KB Created: 2021-02-21 15:28:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 7472acfc3ff5ab28bdbb1d4033f77500 SHA-1: 5cdade716e6f5798c3c582c176893784cba981ca SHA-256: b3f69c684b0d55a6c5c124a2c35cb8f1f432154645379bcf529d1228ef6207ba
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://bologen.ru/wix?keyword=ap+calculus+summer+assignment+answers PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4498992/normal_5fca0fd79d4b8.pdfIn PDF document text
    • https://gedepavo.weebly.com/uploads/1/3/5/3/135391693/381be5d57.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403817/normal_5ff3b6b946c75.pdfIn PDF document text
    • http://movoxazukum.22web.org/sesowafefowikodaxavem.pdfIn PDF document text
    • https://lututigit.weebly.com/uploads/1/3/5/3/135335707/9e6748.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416501/normal_5fdbd424b74d9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384655/normal_5fc7dfe9ea089.pdfIn PDF document text
    • https://lanujedajifita.weebly.com/uploads/1/3/1/3/131382078/eadf7b8dd.pdfIn PDF document text
    • https://tapoduxumusuna.weebly.com/uploads/1/3/4/7/134733142/3967664.pdfIn PDF document text
    • https://tujozidu.weebly.com/uploads/1/3/4/6/134694944/wawisafajesix.pdfIn PDF document text
    • http://jopkapopka.online/jezajoxavasegtnxum.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390071/normal_600cba8cc06f3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481282/normal_5fe3f5b0b427e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://filutapokupa.epizy.com/33245509800.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000afc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFC1 5104 bytes
SHA-256: 17c998396bfc0da0a8ac380b84ffec92cace52730bddab62637513b163f0d7af
font_01_sfnt_off0000c10a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC10A 9480 bytes
SHA-256: f9abc4159bc25a5e41f2dde5bd4db7c2003decc99f34e3486496a2979c144ec6
font_02_sfnt_off0000e177.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE177 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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