Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbca4298c0869d6e…

MALICIOUS

PDF

34.8 KB Created: 2020-11-03 11:07:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-10
MD5: 552a57d6d7d9c448f3474e508141e957 SHA-1: e86e5e4f8ee76091dccef8817fdf81cf9f236590 SHA-256: bbca4298c0869d6ef7fa7560383d8244107adc7ac62fc4b61d0002f77d00077c
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://ggtraff.ru/123?keyword=st+dorothy+parish+bulletin In PDF document text
    • https://votuwokikinoso.weebly.com/uploads/1/3/4/4/134466575/366a708e.pdfIn PDF document text
    • https://dokodajibebabek.weebly.com/uploads/1/3/2/3/132302773/bobojufogamiti.pdfIn PDF document text
    • https://jovikuveditowe.weebly.com/uploads/1/3/0/8/130874612/sewefowisef.pdfIn PDF document text
    • https://pesajupamobe.weebly.com/uploads/1/3/1/6/131607203/tuzulosujekaxegavez.pdfIn PDF document text
    • https://moxitasa.weebly.com/uploads/1/3/1/4/131454719/2840615.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off000049a9.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off000049a9.bin)
    • https://s3.amazonaws.com/mesixadelomomo/sift_heads_ultimatum_start_the_engine.pdfIn PDF document text
    • https://s3.amazonaws.com/gotenukevepunin/49783279371.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ee08ef5-4db6-41cf-8a74-6532ec190cd2/31155741539.pdfIn PDF document text
    • https://s3.amazonaws.com/vofosuvuwapiwo/play_store_error_checking_for_updates.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fceaaa8-0e87-40ff-9de8-636d3276fe86/fararaloj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcbdbaa4-6262-420a-93b5-08d4f2021b88/53308835896.pdfIn PDF document text
    • https://s3.amazonaws.com/bizamesuwepe/91707765843.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0327b0bf-a206-4f84-b045-bc04b00c67f0/31439081314.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/desojusisidere.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 extracted file (font_00_sfnt_off000049a9.bin)

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000049a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x49A9 5392 bytes
SHA-256: 9e6541140666d1961aca84542e2a7413c6ba415b531054d9f20d4768ba839d6b
font_01_sfnt_off00005bf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BF2 10168 bytes
SHA-256: 87896d5cee7ec67f0e980926f4e060a1db93a7be7d11e136529170fd62e4b169

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