Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8c8d8f62f42efdf…

MALICIOUS

PDF

48.0 KB Created: 2020-10-14 00:48:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 85101bb4dd3b4e6231e762f1d3018515 SHA-1: 68d34b85e8b0f04b4c51c5aa1a057cff3565b555 SHA-256: f8c8d8f62f42efdfcdcdad358f07e46851f2ea9802240715a9bb817154cbf1dc
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://cctraff.ru/strik?keyword=barcode+scanner+using+zxing+in+android In PDF document text
    • https://gevafitasib.weebly.com/uploads/1/3/1/3/131380901/1429013.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/1cf22.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/8742796.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/5473886.pdfIn PDF document text
    • https://narogigadi.weebly.com/uploads/1/3/0/8/130874066/c2099e721b.pdfIn PDF document text
    • https://site-1040224.mozfiles.com/files/1040224/22957495494.pdfIn PDF document text
    • https://site-1044148.mozfiles.com/files/1044148/genapomibazexunetotejur.pdfIn PDF document text
    • https://site-1040218.mozfiles.com/files/1040218/86494111988.pdfIn PDF document text
    • https://site-1048260.mozfiles.com/files/1048260/milugusiwuselanejafolaf.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/1/0484/7439/0678/files/vintage_polaris_snowmobile_manuals.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6655/5556/files/new_hanover_county_school_lunch_calendar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8671/8127/files/jung_jae_hyung.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6788/2134/files/zezopilumifixinax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6146/9599/files/nunuzax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9400/7191/files/ucsd_conference_room_reservation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4809/0270/files/40265741623.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_off00007f17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F17 5244 bytes
SHA-256: 9cf4cafc71e0b5bf7575babb839e0a20c254737b7de2f2db88bc0ca14f7c3060
font_01_sfnt_off000090f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90F7 9896 bytes
SHA-256: d447c85e7ff41271b9e60e4c2c784e2b892e8acc1ce3c8d2c2a4b6d882195455

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