Malicious PDF — malware analysis report

Static analysis result for SHA-256 24571b5143e7ba61…

MALICIOUS

PDF

45.2 KB Created: 2020-10-05 03:58:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: e05a34319c8c106f35505fcec2c05a62 SHA-1: b2f37ce6097ed16be27015171c21ab87b3ba45c6 SHA-256: 24571b5143e7ba611a618185079820b73c973d5447c8c1f0232180eb37dfe2ae
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://cctraff.ru/strik?keyword=warframe+rule+34+reddit In PDF document text
    • http://files.salonsuitesjessica.com/uploads/1/3/1/4/131453291/d3144ec6.pdfIn PDF document text
    • http://files.heritagedrama.com/uploads/1/3/1/6/131637889/tiwawupewoj.pdfIn PDF document text
    • http://mulaza.blaine-bacchiocchi.com/uploads/1/3/2/8/132814930/dapalenemuwukos.pdfIn PDF document text
    • http://files.thekingdomiswithin.com/uploads/1/3/1/3/131378899/bf46c78cdcd91.pdfIn PDF document text
    • http://files.mermaidexplorers.com/uploads/1/3/1/8/131856333/5b632d.pdfIn PDF document text
    • http://files.skidderking.com/uploads/1/3/0/8/130814714/xevederubik.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/1/0482/1843/9837/files/zovopuxepijovogiliwil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4787/0876/files/tubix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9715/3943/files/applying_economics_worksheet_factors_of_production.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/5106/0895/files/tupac_changes_lyrics_clean_version.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/7832/3876/files/fedesajeponu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3123/1644/files/rufis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/9704/2333/files/dragon_mania_egg_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_off0000729d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x729D 5140 bytes
SHA-256: 271f174e137775bdcc8a8f2f4d534f181c338de96edaf8933d8ebc7811d40000
font_01_sfnt_off0000841c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x841C 10648 bytes
SHA-256: e4879d0fbb2d0e74a08f4f1be1d6e65999712764fdf031a3e573f93b9fbda7b0