Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f24dfcf8d6fdd91…

MALICIOUS

PDF

41.7 KB Created: 2020-10-07 04:01:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 1a831a8e192dcfcf9d37ed4d672e7948 SHA-1: 666ecc3794b9c2fff066b8d2f620a740a4d03201 SHA-256: 7f24dfcf8d6fdd91f63146dd811d80cc63e00b3aded2311af6c9df7a99406636
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/strik?keyword=cube+escape+solution In PDF document text
    • http://talapuj.yourcuddlycompanions.com/uploads/1/3/1/4/131410007/wirilefudosimum-lorojez-miribowi.pdfIn PDF document text
    • http://xegokaw.evalew.com/uploads/1/3/1/8/131871767/6908804.pdfIn PDF document text
    • http://jozoweru.whatsnextreport.com/uploads/1/3/1/6/131606343/wimatum.pdfIn PDF document text
    • http://foruxiv.nicoleadriennecreative.com/uploads/1/3/1/3/131379179/9207985.pdfIn PDF document text
    • http://kofel.writingtotheworld.com/uploads/1/3/2/7/132740708/6145278.pdfIn PDF document text
    • http://files.lcooperillustration.com/uploads/1/3/1/4/131453402/lozupopu-bedota.pdfIn PDF document text
    • http://kujavi.greensavannahstables.com/uploads/1/3/2/7/132741555/tavetuweda.pdfIn PDF document text
    • http://files.driving--lessons--worcester.co.uk/uploads/1/3/2/7/132740586/xibaligolexa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/8045/7623/files/2018_harley_touring_service_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/6950/5187/files/cricut_giant_flowers_projects.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0468/8432/3485/files/72895380400.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/9354/5126/files/wrath_of_the_lich_king_hunter_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0046/1474/files/wexazurumadifutur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2525/3023/files/96508312009.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8183/2350/files/talonro_leveling_guide_hunter.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/4467/9063/files/tongue_dog_meme.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_off00006775.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6775 4876 bytes
SHA-256: b0ea3e336271d8fd28380e996d34517b75faa5fa0456d133ffc053e54c0cce73
font_01_sfnt_off00007816.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7816 9980 bytes
SHA-256: 5788f679402bea36cf8e72f46295bfb66738cd0d59d52b222e3f0ddb473001b3

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