Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebd2eced5b457d4f…

MALICIOUS

PDF

70.5 KB Created: 2020-11-06 23:32:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 2ab282a2ab78e2b3de8c411989894edc SHA-1: 8eb3035d660a4bcc72fab7d9cd70fa21f6e2cb77 SHA-256: ebd2eced5b457d4f24ed288b50f396f1e8e9d5d54572d58907b9a41b88e743fa
144 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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
  • 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://traffset.ru/aws?keyword=dretch+demon+pathfinder PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366317/normal_5f93a35e11eed.pdfIn PDF document text
    • https://jivoxafur.weebly.com/uploads/1/3/4/3/134382284/pexarapem.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371010/normal_5f95bab00d2a2.pdfIn PDF document text
    • https://dawugagulinejud.weebly.com/uploads/1/3/4/3/134368664/mofekixoxititel.pdfIn PDF document text
    • https://rixapozati.weebly.com/uploads/1/3/4/4/134456921/1297255.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393180/normal_5f9dc4fc47c78.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416792/normal_5fa39be1815fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387925/normal_5fa3d9ce2538e.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/wibadinavosunom/alcoholismo_en_jovenes.pdfIn PDF document text
    • https://s3.amazonaws.com/fizaxo/41210295778.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29f712cc-aef5-4472-8f8b-1f71606c2935/22696650124.pdfIn PDF document text
    • https://s3.amazonaws.com/kezemiradigu/54870793915.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49efad1a-b19f-45fd-af6c-e847713cf3b9/gaxokuzikifedewidobemo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8e6c9ff-796b-4185-adb4-9567164f9151/45272791091.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6837e4c0-b3be-472f-9e1d-6590bf126d4a/36785421002.pdfIn PDF document text
    • https://s3.amazonaws.com/midaguvimabof/serope.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_off0000d6ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6EF 5184 bytes
SHA-256: 566943e5278b7b3ce5a8b129c72c2853829e3fcdc807e8cce54459b7c5f1aee2
font_01_sfnt_off0000e86e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE86E 10844 bytes
SHA-256: 1e68bb7de192522d1cf90d931fa9926eaf39e2b4aa23bc29e20e02fe40aff85b

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