Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef4cfbddc96e2380…

MALICIOUS

PDF

67.3 KB Created: 2020-10-05 02:01:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 326df5378cfa94984e8d0a26507e3d8c SHA-1: 5565658cce149698df74e8e92660f541a82442f4 SHA-256: ef4cfbddc96e2380543f919461026df1dd4a718203211e16db6f69607f4a9b9e
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://gettraff.ru/strik?keyword=sahih+bukhari+sharif+pdf In PDF document text
    • https://site-1036917.mozfiles.com/files/1036917/niritiwatovifise.pdfIn PDF document text
    • https://site-1042359.mozfiles.com/files/1042359/72136657951.pdfIn PDF document text
    • http://files.zetaiota.org/uploads/1/3/1/6/131637839/pegujisisavaliv.pdfIn PDF document text
    • http://files.willettswelding.com/uploads/1/3/0/7/130776673/mubomulazilisis.pdfIn PDF document text
    • http://beboguw.poconohydrofarm.com/uploads/1/3/1/3/131398097/2b5bed9b.pdfIn PDF document text
    • http://vipuj.melanieguerraphotography.com/uploads/1/3/0/7/130740166/dizelumisew.pdfIn PDF document text
    • http://files.rhythmresearchresources.net/uploads/1/3/1/6/131606127/gelizoxi-mevep-xuzumifam.pdfIn PDF document text
    • http://lebolovis.athomenursing.com/uploads/1/3/1/3/131380600/xudon.pdfIn PDF document text
    • http://files.didilawson.com/uploads/1/3/0/7/130776327/porone.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0454/7362/8326/files/3172199736.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1751/9772/files/17401764917.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/0104/0024/files/creedence_clearwater_revival_pendulum_vinyl.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7720/6165/files/42074741899.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0000d994.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xD994 22292 bytes
SHA-256: bf199979b01f84df11c13b90fb46b0cfe00004efdbb6d50bceb51515e13c4480
font_00_sfnt_off0000a1f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA1F1 5404 bytes
SHA-256: 7cd14f7d4d11efe5a970f9328e02e3ae80d8ef3eebf4e40d8d7d82a280b40a71
font_01_sfnt_off0000b440.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB440 11092 bytes
SHA-256: 9637a4e23442f344272140f4d965341ed0334320f23d84867d86c239947b7f0c

Open this report in the interactive analyzer, or submit your own file for analysis.