Malicious PDF — malware analysis report

Static analysis result for SHA-256 732357c0329f54d1…

MALICIOUS

PDF

45.3 KB Created: 2020-08-23 08:07:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 93a5654e792adfd7427804a6185476e0 SHA-1: ccc7176777809c2447bcd35e43b44b43aaa2f799 SHA-256: 732357c0329f54d1d21af8aec83de04e76be92cc13450eaab8ba5b3f1343ef77
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://ttraff.cc/pify?keyword=belfast+confetti+analysis+pdf In PDF document text
    • http://files.thepetalpatch.com/uploads/1/3/1/4/131407705/silebe.pdfIn PDF document text
    • http://tekali.treeremovalftlauderdale.com/uploads/1/3/2/8/132815367/3461d04e3be88e0.pdfIn PDF document text
    • http://jodul.wuaaup.org/uploads/1/3/0/7/130739173/6825115.pdfIn PDF document text
    • http://kutologa.onlinemobiletrainer.com/uploads/1/3/1/6/131606343/a21aa0da3cdff4b.pdfIn PDF document text
    • http://gamufi.walkersonwater.com/uploads/1/3/1/0/131070374/gorabofo_zonakoregen_redesenevonu_nonir.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5339/1765/files/77492288585.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1466/7934/files/89500115292.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zosakasebiribo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1715/9335/files/7897273108.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2168/1315/files/unbalanced_assignment_problem_example.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2524/4053/files/88187334047.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4495/4527/files/576534121.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4518/2888/files/rpsc_calendar_2018-_19.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8205/4813/files/breast_cancer_awareness_ribbon_to.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/581871399.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5318/7221/files/69391409482.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000067fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67FE 4992 bytes
SHA-256: 58e462e19b3eda4f8d77c209121fbbc91e42b29842a4d416cb4e5046e01b0073
font_01_sfnt_off00007909.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7909 9760 bytes
SHA-256: 1032e1516e3c1c4e847cf4cc4731389ad7139560bac893dc3bf3944c785a7eb6
font_02_sfnt_off00009a56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A56 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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