Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e349cc0de4f3b68…

MALICIOUS

PDF

54.2 KB Created: 2020-11-08 14:41:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 1b33c4d9102f67ce6ec0b62a5b4c2694 SHA-1: f3bdf0521828db35b169ddac8a490ac0d5b49531 SHA-256: 7e349cc0de4f3b68040da4f7c7f86ea8fbba082f77ea956a017f691e9d0796dd
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/123?keyword=ffxiv+airship+and+submarine+guide In PDF document text
    • https://jefogozadiz.weebly.com/uploads/1/3/4/0/134040800/darifepowesik.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376103/normal_5f972c54dc88c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414871/normal_5f9f3ea07f495.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371783/normal_5fa45a03608bb.pdfIn PDF document text
    • https://tefidimigeb.weebly.com/uploads/1/3/4/3/134319466/soxifalide-fesosuras.pdfIn PDF document text
    • https://fizolapojola.weebly.com/uploads/1/3/1/3/131383549/dinimazigo.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/tadib-pepalitegugoj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390097/normal_5fa741ea6ec19.pdfIn PDF document text
    • https://raxitiladiruwek.weebly.com/uploads/1/3/4/4/134487911/vijufijonifuxej.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366969/normal_5f8d1f15a927b.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/6d9265ad-947f-4867-a287-f6045d3c694c/maxetokavuzifuxufuxumoli.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23190ca7-1cfd-42ff-96c1-21af6307e19e/aggravated_stalking_florida_state_statute.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d08d8c3-42c6-4864-a88c-d629b2439169/fakidonoxosiwidugutowexu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3459b34d-e711-4a7b-a69b-b7a4a6ab784a/mivizirewipexuvuzolanuzef.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00009f93.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x9F93 25292 bytes
SHA-256: 1acb5fca1e008f38423faadf0a7dfcd6625cf14933ccfa9a47b55f3d091bc329
font_00_sfnt_off00006950.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6950 5648 bytes
SHA-256: 1fd62dbdf1b7e3caf3348cf7724c470ed981281c5d957399002c27164d95c3c8
font_01_sfnt_off00007c67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C67 10252 bytes
SHA-256: 84d71244c7c3cb7628318f58cdf0ead371a28243b0efc197a58a2c140eb7343e

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