Malicious PDF — malware analysis report

Static analysis result for SHA-256 02ef0b89cebf4f30…

MALICIOUS

PDF

46.2 KB Created: 2020-11-03 16:02:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 0b81e1d28e37ea6c2eae31b0c2b9b299 SHA-1: 2614ad84c6a5c8df5317dc3262c7f564ea50aff6 SHA-256: 02ef0b89cebf4f30729bf67c7d0a5efd9a3885bcd647d6c26a46e10309e892de
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://ttraff.me/123?keyword=english+spot+rabbits In PDF document text
    • https://wedezetepeb.weebly.com/uploads/1/3/4/5/134528952/66010d4.pdfIn PDF document text
    • https://nuxirudeduw.weebly.com/uploads/1/3/4/4/134442083/805f0e.pdfIn PDF document text
    • https://vodipewelo.weebly.com/uploads/1/3/1/6/131637384/7840b53d38.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458417/normal_5fa141c4af509.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/naramuro/degezojogifepewo.pdfIn PDF document text
    • https://s3.amazonaws.com/bokofapig/tech_toyz_aerodrone_x13_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b91ea67e-9dc2-46ff-ae77-f794a37c8215/vafolip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c84fab7-f4bb-46a9-b819-4340f8dc3fd3/fawexakulunak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28466570-19de-42c8-8aea-52f884eb2cb0/84525482570.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc1071da-5eff-4a44-8b27-365952fd3b26/dark_souls_3_symbol_next_to_bonfire.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/013d1ff2-7ebd-4d52-9aa9-006dd260af45/roberto_bonafont_wikipedia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88eb4175-33b4-4c7b-8794-aac5832b46f3/brozz_250_recon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e5b0418-bd54-4022-af12-514325204b77/razajosun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4e66d0f-0b81-4d35-b1c6-0a652197f57e/11897262092.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_off000077f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77F0 5180 bytes
SHA-256: d76890e6cdda33a90e9e0d8e0443907d146030a19f3ee43e1ce7bf06623f0781
font_01_sfnt_off00008987.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8987 10144 bytes
SHA-256: 1bd720647d787c07894673bd9f6d14ed8ed90aebbce7a9b5b8495381af2d8f18

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