Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7691724a58bb1a5…

MALICIOUS

PDF

41.9 KB Created: 2020-10-03 03:53:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: c2799ddb272ec58a0f12177b072070b2 SHA-1: 22fdb9e4135e10ff04b8736e3a60aaab864c1d26 SHA-256: f7691724a58bb1a5813fefb69737ff30e11406ae32b7e371bf5eea92a2a7f6e3
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/pify?keyword=miniature+candy+bar+wrappers+printable In PDF document text
    • http://vakonow.doublejoutfittersny.com/uploads/1/3/1/6/131606271/2717341.pdfIn PDF document text
    • http://sogavesa.stkjustlabskennel.com/uploads/1/3/0/7/130776418/0ff1837.pdfIn PDF document text
    • http://files.goodshepherdgratz.com/uploads/1/3/0/9/130969075/miratov-kekezoxagomaga-jebejuwovosive.pdfIn PDF document text
    • https://site-1037176.mozfiles.com/files/1037176/64566398200.pdfIn PDF document text
    • https://site-1039217.mozfiles.com/files/1039217/bedadakitaguwezamuvibegu.pdfIn PDF document text
    • https://site-1036630.mozfiles.com/files/1036630/jusekusukabo.pdfIn PDF document text
    • https://site-1039918.mozfiles.com/files/1039918/duzadugemupugaze.pdfIn PDF document text
    • https://site-1036920.mozfiles.com/files/1036920/zejubomedudevagekonakem.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/1/0483/2634/4857/files/57791580388.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8692/0347/files/minergate_apk_2.3.5.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/2278/0069/files/grit_hockey_bag_junior.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/5323/9457/files/5e_injury_table_high_rollers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7206/8520/files/bewazavivowume.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/0518/1603/files/free_download_supersu_root_apk_tool.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/4100/1119/files/renaissance_mini_q_document_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5912/5153/files/99651092491.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_off0000655c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x655C 5408 bytes
SHA-256: 0a2427577ffb7df15078ed81262e8f993dee17e197cd1747cb22289fb9312ef8
font_01_sfnt_off000077ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77EA 10164 bytes
SHA-256: dccac2f23e12857e797991872462664ebe3105ce3c78527f407e8d4a0572f795

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