Malicious PDF — malware analysis report

Static analysis result for SHA-256 708d4cd6d20dc8d5…

MALICIOUS

PDF

36.7 KB Created: 2020-11-07 22:28:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 1b1f69aab7dfc06a7ae0508de2bb00ce SHA-1: fafe8be67ae9121b2157ca8377ffecec35529772 SHA-256: 708d4cd6d20dc8d571d0347ca865413b28e3783b6dc80798752f9a9a87acfd6a
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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=drake+so+far+gone+zip PDF link annotation
    • https://mukaxonalox.weebly.com/uploads/1/3/4/5/134580963/modakovotolofawaben.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373998/normal_5f8ef0aa6a0c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411700/normal_5f9accf4dbb73.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402488/normal_5fa1fdccccbc6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367301/normal_5f888f6aeae9a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454182/normal_5fa4bf75713c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387931/normal_5f9f01e9186bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386621/normal_5f9cfb5e933b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383704/normal_5f9f86d8dd12d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376850/normal_5f93284aaa3cb.pdfIn PDF document text
    • https://nijubalalo.weebly.com/uploads/1/3/1/4/131453980/2678011.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/resixexi/gupurirumu.pdfIn PDF document text
    • https://s3.amazonaws.com/napisakaluja/gixetukip.pdfIn PDF document text
    • https://s3.amazonaws.com/dazifozixawus/7160982703.pdfIn PDF document text
    • https://s3.amazonaws.com/jozetej/wokalefatiwudate.pdfIn PDF document text
    • https://s3.amazonaws.com/salade/epg_electronic_program_guide.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_off00004fb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4FB3 5152 bytes
SHA-256: de4d2ea68a92d7f6f6b0c7e5c440b33321762123708101899e6f80d79fb9854b
font_01_sfnt_off0000615f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x615F 10900 bytes
SHA-256: 747c027628c9db9b19b2ba70177f5555d61dc5a645c401a5a784b4d8d0130f39