Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd17dbf316b1aadc…

MALICIOUS

PDF

58.7 KB Created: 2020-11-07 20:05:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: d3f955d2e5378d6f113af69fc919792d SHA-1: 629692323ca8a4c6c46029e17ec5e7d00943bb2f SHA-256: cd17dbf316b1aadc244514d0eb8a17f24331c342c95eb29ece22a104a20f49ec
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://traffking.ru/aws?keyword=a+confederacy+of+dunces+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4409413/normal_5f9fab21587d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420468/normal_5f9e466ae77eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387922/normal_5f920a883ab3a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445532/normal_5fa12e64bd110.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369504/normal_5f893d7962bce.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e0e31a2-02a7-4bb6-8f1b-d00aaf9b296c/44056720047.pdfIn PDF document text
    • https://s3.amazonaws.com/sulasatevirexo/23245544596.pdfIn PDF document text
    • https://s3.amazonaws.com/kasuwevovog/analytical_mechanics.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/snacks_recipes_in_telugu.pdfIn PDF document text
    • https://s3.amazonaws.com/belapawerezuju/how_to_cast_a_wiccan_circle.pdfIn PDF document text
    • https://s3.amazonaws.com/wutezigojuxi/91382751797.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000879b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x879B 6444 bytes
SHA-256: b2eb716f9f1f9b32722e1ea04f9b39d21e8999039eb4c7f2f5ede24790997a64
font_01_sfnt_off0000978b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x978B 5208 bytes
SHA-256: 008bebcc9c06c574bc95f123ba7951f1be69b769198ab11bdc04f720dd77adcc
font_02_sfnt_off0000a95f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA95F 10960 bytes
SHA-256: da01100aafc947f14ef43e13681071e403efbce795e8e860d64361a12a22d38f
font_03_sfnt_off0000ce99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE99 6084 bytes
SHA-256: 0bbd385887db5074fbd87256d70f98a882c9353f1362fd6c1377f0ce146e0394

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