Malicious PDF — malware analysis report

Static analysis result for SHA-256 db5a62c8e5cd8d9f…

MALICIOUS

PDF

44.1 KB Created: 2020-11-09 09:07:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 1824230f728c4135ae9c921212a578f8 SHA-1: 3d76cfea089f56e687709b351bea945ea4ffef7f SHA-256: db5a62c8e5cd8d9f599a9ce04fc498cbd07d55c0de09bef3d74dbb45096e0ad8
76 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a lure referencing a game quest ('Lotro that which i value most quest') and includes a high-priority heuristic firing for an SEO redirector link. This link, https://traffnew.ru/123?keyword=lotro+that+which+i+value+most+quest, is embedded within the document and likely leads to a malicious site. The ML classifier also strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffnew.ru/123?keyword=lotro+that+which+i+value+most+quest PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4374203/normal_5f8af1c42f1d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459177/normal_5fa152f04cb3b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369903/normal_5f8ca50777b3a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369189/normal_5fa0538f2ea6d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369665/normal_5f8e7fef20c34.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414174/normal_5f9d933d64aa5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424376/normal_5f9d79d37616f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409123/normal_5f9814d8b41db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418391/normal_5f98f4693dbd6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kavugusepe/ordinary_men.pdfIn PDF document text
    • https://s3.amazonaws.com/fapaga/majin_buu_saga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3c2b1ee-09da-453a-8400-332e0a50dd40/63185478560.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9a3cab0-ce1a-4c1a-a267-ce950c9802fa/jitelujodijof.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/anemia_in_chronic_kidney_disease.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/73251824199.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxuledo/radial_tunnel_syndrome_exercises.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_off00006c6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C6A 5260 bytes
SHA-256: 7a815246aa1828f547b8458b5a582402070c12db6f52d27aa74c6f8a9ac584d9
font_01_sfnt_off00007e3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E3C 10924 bytes
SHA-256: ac1cb17885ec27cb299dd814090bca100234c6979d67a95166200efd9ad62b2b