Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e5113ee49083685…

MALICIOUS

PDF

42.6 KB Created: 2020-11-09 08:04:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: a1b52d2965e2b911e0ecbc71d761aef9 SHA-1: e4205864be6d23ede7c64b0f60023899fa42e0b2 SHA-256: 6e5113ee49083685b841e3d1ef31818afa8f76f7cf4bbac51bb9d15520a4a072
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://traffking.ru/aws?keyword=blank+space+character+copy In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367635/normal_5f881db4d6bb1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383445/normal_5f8fe240057f2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382190/normal_5f987a8204d2f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376874/normal_5f9556ec068c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372378/normal_5fa89921a4d5b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386337/normal_5f9d19dd42753.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377706/normal_5f8e8ee0f335d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365525/normal_5f8cf977b1b1e.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/a1195aaf-cc38-4cd7-945f-34f29b49863c/jaguar_repair_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/jeduzizonox/the_lightning_thief_book.pdfIn PDF document text
    • https://s3.amazonaws.com/zizene/thanksgiving_cranberry_sauce_spicy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9772570-2dd1-4ee1-a439-e3843ef54455/nememuvusil.pdfIn PDF document text
    • https://rasofopob.files.wordpress.com/2020/11/lezyne_macro_drive_1300xl_manual.pdfIn PDF document text
    • https://gozevawu.files.wordpress.com/2020/11/3954572284.pdfIn PDF document text
    • https://s3.amazonaws.com/loxopudizus/champva_policy_manual_chapter_3_section_7.1.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_off00005e07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E07 2828 bytes
SHA-256: b7f317aa0f29cd34df008dc84d8f376d2685882a57a4a5cd0d86477d0adf885a
font_01_sfnt_off00006802.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6802 5236 bytes
SHA-256: 6f95b50ae2df7eb582003940a79b9fe15562b3c6c0774abfc75c91efa2e3f07a
font_02_sfnt_off000079d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79D4 10332 bytes
SHA-256: c18c23503ec18ab1dab2283d05a263e899c4869c3402f9df35c47654fd4912a3

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