Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a18e25eb588c6d4…

MALICIOUS

PDF

57.8 KB Created: 2020-11-09 00:29:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 75c5e24c399bb1ffe5dad6b67bb5058d SHA-1: 1ccd1613541a2afa918d4ed8a8dae1c1def01daf SHA-256: 5a18e25eb588c6d44088cef492a6fb13e9864c3f47c88be2b5aa714f970c3776
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=youtube+tv+on+amazon+fire+stick+4k+reviews In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368219/normal_5f91fc301adf5.pdfIn PDF document text
    • https://nelugawoteraxum.weebly.com/uploads/1/3/4/7/134707069/jifuxaxar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369518/normal_5f8f15e7042f3.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/42fa6585-195d-4ec3-bbbb-ec143ea2bd48/79993802158.pdfIn PDF document text
    • https://s3.amazonaws.com/midipes/rmf-tx300u_sony_remote_control_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4369a82e-3e40-4a21-9ae6-28c2b3b2bfb8/furite.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ad2f454-b478-4fce-83ce-45341ebd691d/407186362.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ff51818-ccb4-4e32-b5b6-3dbb5c5bf4b6/47297753625.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83608bfc-06e7-483d-bc96-a1351f23b7d3/gamecih_2_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6fcf217-908e-4661-be99-852488e888e5/pejagupovovufi.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/votexesasavepedenunesake.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97be2998-e1d0-46c9-ba07-7e427e5c1f05/blessed_be_the_lord_god_almighty_lyrics.pdfIn PDF document text
    • https://s3.amazonaws.com/bevekizadoxuj/1661633229.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc52f985-a6e1-4839-aa75-2d68f90722ce/levels_of_questions_stems.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_006_off0000ae46.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xAE46 25528 bytes
SHA-256: a3c91d26a784964628f07c78cc06701c094a7471c101309f755508d2b7cf19c9
font_00_sfnt_off00007692.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7692 5452 bytes
SHA-256: ad012ae82c2ac5ae653097593646ffdbcd68dcc3d6e68cd7fc4305b0987e6254
font_01_sfnt_off00008933.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8933 10796 bytes
SHA-256: 7750854fa7d307a2e37b2de5ca79d55113e5127d7ba54794eb49826a4613936f

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