Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e09c3dd183bca60…

MALICIOUS

PDF

42.7 KB Created: 2020-11-05 15:53:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 213c0a52132b440d9202440ece64c29f SHA-1: 88357fc3418b82b6288ce2c366ebb363ce04aa1d SHA-256: 3e09c3dd183bca60ebbd069e62080c793d5c03046cc2a7dfaa554c66f25ed7e4
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://traffking.ru/aws?keyword=pokemon+go+unblocked+games+77 In PDF document text
    • https://vodoxuzet.weebly.com/uploads/1/3/2/6/132681632/1742066.pdfIn PDF document text
    • https://zadumeredevasax.weebly.com/uploads/1/3/1/4/131453870/2913929.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406793/normal_5f953f1846629.pdfIn PDF document text
    • https://xukaxikerebata.weebly.com/uploads/1/3/4/0/134042698/dezubupil_gugirudoguwa_bujomosep.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450047/normal_5fa26acfafac2.pdfIn PDF document text
    • https://rajaxamakato.weebly.com/uploads/1/3/2/3/132302926/826dcbb4ef6b5aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371508/normal_5f8ce88d1790c.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/zerejibixupav/rijewutokevu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0630/4166/files/zip_code_for_big_falls_wi.pdfIn PDF document text
    • https://s3.amazonaws.com/godoremitiwuja/windows_10_the_missing_manual.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_off0000637b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x637B 5448 bytes
SHA-256: 1f5aea567763ec3a09506d07da38df2c665a4734e07206e15d11ca23af5d8375
font_01_sfnt_off00007601.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7601 11368 bytes
SHA-256: 17be3993f0e666177663b4e27799090b3aac95f2f593635b373b670e219ec43f