Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bef75e0e04f586b…

MALICIOUS

PDF

43.7 KB Created: 2020-10-28 14:30:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: f21cdc590a1082150291a0b6c2f4a4fa SHA-1: 49ba1706c46b39ab0ca3315cb537a7d8df71ddae SHA-256: 6bef75e0e04f586b898b33e263a359faa81e8b11ee8729b4ecfe92569e976ce9
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.me/123?keyword=manual+lathe+machinist+jobs In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367622/normal_5f87c6c551f29.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/3808383.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366048/normal_5f874a9217b36.pdfIn PDF document text
    • https://wefamojugibe.weebly.com/uploads/1/3/1/1/131164519/nokatifufatimimemuj.pdfIn PDF document text
    • https://vavavutexe.weebly.com/uploads/1/3/4/4/134441002/todubexagaxekatip.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000690c.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000690c.bin)
    • https://cdn.shopify.com/s/files/1/0433/9302/4151/files/dirt_bike_memes_funny.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5faebf67-8ca5-46fb-998a-d360d70a521c/36268853258.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d28b574-b89c-40d0-9a6a-bca7adb7a12a/vizapujiviwuvefimibugugeb.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/what_is_millennials.pdfIn PDF document text
    • https://s3.amazonaws.com/fujadabez/tezugamesifu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/7905/0438/files/kitoxazemimura.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/31678819644.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/2525748059.pdfIn PDF document text
    • https://s3.amazonaws.com/zevutebulaworel/jenis_blanching.pdfIn PDF document text
    • https://s3.amazonaws.com/dabatisew/8147906562.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11235fb9-914f-40ee-8651-b752b270cf01/puboboluk.pdfIn PDF document text
    • https://s3.amazonaws.com/biwubeleba/convert_string_base64_to_c.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/50085451270.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa047fe6-e50d-4708-80f4-301749ec12b3/52043338021.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 extracted file (font_00_sfnt_off0000690c.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000690c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x690C 5164 bytes
SHA-256: d26e237f4e2163144360a5f1d52223dfe30851a498d674d6d21b77206e42b96a
font_01_sfnt_off00007a83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A83 11640 bytes
SHA-256: a77166349bea4e7974bb3ed3ec8f3f5dea9ba07493eeacf93067651cf70e9168