Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2fd38e141d1d8bd…

MALICIOUS

PDF

41.6 KB Created: 2020-10-30 02:14:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: cfb70c2255edbdf90ad078f16324f2ce SHA-1: d7b94115bfa961733d540df1ff6a571954645758 SHA-256: c2fd38e141d1d8bd3116b14338d88654dfbc58bd35f53fcd2c35df6d5b6a239f
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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://gettraff.ru/123?keyword=minecraft+small+and+gate In PDF document text
    • https://pafuwaron.weebly.com/uploads/1/3/4/3/134385690/goxonobovaram.pdfIn PDF document text
    • https://xutewosabog.weebly.com/uploads/1/3/2/3/132303209/cc82c65ca.pdfIn PDF document text
    • https://wefamojugibe.weebly.com/uploads/1/3/1/1/131164519/poduko.pdfIn PDF document text
    • https://papazutizo.weebly.com/uploads/1/3/4/4/134467207/gevijabe-puvadagonakuf-fuvokusomufozef.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
    • https://uploads.strikinglycdn.com/files/fe00d090-8306-40c5-9604-2844d689f1fb/sunox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c27302d0-8d2c-4c06-9012-0dafb0857583/zisali.pdfIn PDF document text
    • https://s3.amazonaws.com/xipavir/tratamento_de_anemia_falciforme.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37402203-96fd-4acd-a150-2267c71df3fd/54996728887.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bafe6373-c9e3-47bd-b84c-59cd1151e540/79265279759.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed4e752f-b3fa-4320-bbcb-a3fa65220b55/loduragolojom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6b14b2e-c0c3-47a2-99a3-d80588839ba4/70_weeks_of_daniel_youtube.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_off000057b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x57B6 5024 bytes
SHA-256: 0522e99c5a054e58a2528edf4af8cff833842c1449bcb02569a21e274bad56b3
font_01_sfnt_off000068aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68AA 10436 bytes
SHA-256: 3ff11e1837b71de408948f429e7f3495c6c567098da94868a4c9484f0611d1c0
font_02_sfnt_off00008c2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C2A 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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