Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4fc4eef394fb52f…

MALICIOUS

PDF

40.9 KB Created: 2020-10-04 18:13:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 10105089709252901ae2495cf0defa92 SHA-1: d7275be0f080569cf9d7f034f1215fafae1169c3 SHA-256: a4fc4eef394fb52fabeb46d3145307e2d864628006663ad6f176a98626aa6be6
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://ttraff.link/pify?keyword=plants+vs+zombies+3+apk+download In PDF document text
    • https://site-1036826.mozfiles.com/files/1036826/13920091455.pdfIn PDF document text
    • https://site-1042343.mozfiles.com/files/1042343/48179109190.pdfIn PDF document text
    • https://site-1038715.mozfiles.com/files/1038715/gidajelijutebe.pdfIn PDF document text
    • http://files.glassexpressions.in/uploads/1/3/1/1/131163854/7656976.pdfIn PDF document text
    • http://wasegid.mirandacraig.co/uploads/1/3/1/4/131438025/8449165.pdfIn PDF document text
    • http://xifaze.vagabondgeology.com/uploads/1/3/1/6/131636917/fopewitobizisesijovo.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/0278745c-012e-4c2e-8951-33786e2793f0/puruzire.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc93f248-5e59-405e-85b8-4aa8f3470329/tubobu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98b88c7f-e649-4302-a7e2-c1255e733d6e/45200037638.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f4ac74c-4f7a-40d1-9273-2d732dda5a14/84467461186.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1f14f07-94e4-41a2-b0cf-f26c1cb96ce9/38358034828.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b117a1f8-7e6f-414b-bda8-7251632085b7/notoledogimutivunonalej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b88a3d0-8dac-49da-9256-e50f25bd9cf0/xezexukatagikuko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29795ff6-9d8e-4a38-b613-4bf34cf523ce/nupevozu.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F49 5580 bytes
SHA-256: a3fcc658f910b6339833a017c5fc26e64f2a1655db3bdf70cd459e214b8c242b
font_01_sfnt_off0000724c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x724C 10988 bytes
SHA-256: d8dd2ae10ba06cf9ba3020fc335789c1f8b73e461a734c7bf65343d23443a7fd

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