Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d6304b098a0574c…

MALICIOUS

PDF

46.9 KB Created: 2020-11-09 16:42:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 26d12e91981c215fdfe81a58ed54c713 SHA-1: 112a421a5f8bbb731bf2c8315cd39a34ae5dc826 SHA-256: 8d6304b098a0574ce78e64a86ba78eed77467f54ed0c56b9aa627d301b830454
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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://trafffi.ru/123?keyword=htc+inspire+secret+codes PDF link annotation
    • https://fimelaxezabu.weebly.com/uploads/1/3/4/6/134622198/xodofawuvibizitug.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381762/normal_5f965cb293133.pdfIn PDF document text
    • https://kepigepejabuji.weebly.com/uploads/1/3/4/3/134315220/xifijetoge.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379720/normal_5f9091375a6f2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374380/normal_5f8a51e1700c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381105/normal_5f92b3618d919.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/degerutisig/mikato.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/079d9b31-a8eb-4151-a699-c4018e65b76b/vizijokerulup.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/50978448549.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2d42b65-bb3b-4b0d-8338-60462e13dcfc/xufexuzanelukowekajokulol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18f91106-9a86-438b-ae3f-9d141a9c50e8/como_poner_el_formato_apa_en_word_2013.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_off0000605e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x605E 7460 bytes
SHA-256: 3a02d7fd41e065e2ef8bf533d22a6d018c4ba5216388f4466a80e7e6cd67c0e3
font_01_sfnt_off000078d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78D5 4784 bytes
SHA-256: fd9ac167447c29f1e0ae7303cc3cb84c03436bcd7818a20e7d5b9f212502c447
font_02_sfnt_off0000892a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x892A 10568 bytes
SHA-256: a1225a29ecb82749f34193e4ace79d4ebeb78a2525edf760b2e5e92330d7a0d7

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