Malicious PDF — malware analysis report

Static analysis result for SHA-256 25d00fcf94287ee5…

MALICIOUS

PDF

40.7 KB Created: 2020-10-04 07:41:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 47197f10d9342478bcf2fadb2cfd746e SHA-1: 7243360db146b1717b00930699580c62f8d22148 SHA-256: 25d00fcf94287ee5cb2f17897b5b2c930e8818b95167693e1eb2c7071de31a80
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://gettraff.ru/strik?keyword=soccer+manager+2020+mod+apk In PDF document text
    • http://files.pathrochestermn.net/uploads/1/3/1/3/131398144/sugizujovitawe.pdfIn PDF document text
    • http://files.galateeagallery.com/uploads/1/3/1/4/131453099/1964212.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/1/0479/6150/5955/files/tinib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/2204/3296/files/64511551822.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3269/9302/files/42399631705.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9011/5748/files/cobra_kai_costume_toddler.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/1121/5007/files/78834759403.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/9199/8360/files/rich_dad_guide_to_investing_in_hindi_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8029/4306/files/law_legislation_and_liberty.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6545/8342/files/ashe_post_timeskip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/6214/1340/files/93.1_el_rey_telefono.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/9170/9092/files/gixofevuxatobenuzebe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/4661/2373/files/gerirojidoroja.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_off0000600b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x600B 5624 bytes
SHA-256: ba1ecbc3c06591ffd16951cfccade446ff2221a13a23fac97d7fd0562e10d4ca
font_01_sfnt_off00007320.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7320 10180 bytes
SHA-256: ae4380936ee535e7acc98160f561502b540c2c7f17470cdc1709435bd01859f2