Malicious PDF — malware analysis report

Static analysis result for SHA-256 f80eca02d8989657…

MALICIOUS

PDF

35.7 KB Created: 2020-10-01 01:54:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 4cfaaef70c115e35c42145959fba42e7 SHA-1: 3caca0aeebe642c740007a7667c1cc7fd74c0a9c SHA-256: f80eca02d89896579e1b8459d713a7b90d674a523dcfdf4b9d1e6dd6aed23ef9
202 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ggtraff.ru/strik?keyword=times+of+india+epaper+mumbai+pdf+download In PDF document text
    • https://site-1037091.mozfiles.com/files/1037091/wozeduwekofel.pdfIn PDF document text
    • https://site-1036698.mozfiles.com/files/1036698/29385195280.pdfIn PDF document text
    • http://tukezoli.msa29palms.org/uploads/1/3/1/3/131380969/naxaletutu.pdfIn PDF document text
    • http://sejolomu.decipherink.com/uploads/1/3/1/3/131384380/6394303.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/1/0440/0673/6037/files/soil_block_maker.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6427/8686/files/suwexusizutedukamuvo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/5783/4903/files/duchess_of_kent_wedding.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9888/1704/files/89948820840.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/faee3da5-8793-4c96-84e5-184276b2c87d/68150989917.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc2ec613-76ba-4b45-be2e-da97572abb9c/velatosovatijida.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004d89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4D89 5368 bytes
SHA-256: ae1288b8aa0fcdd7494d7828e7570b7795764c787b15a86ca44a67bf0c9d4314
font_01_sfnt_off00005fbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FBB 10192 bytes
SHA-256: 98db541f84f3a2fbc6ee354c856b2e99cd2c600344355b7b831fed388278c767