Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6568db91a6a49c6…

MALICIOUS

PDF

40.2 KB Created: 2020-10-06 14:51:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: bc9d6ddc5d66d07da3792cf7c68ed735 SHA-1: 6771573d63649a378d470e55c23c625cf4dbc259 SHA-256: a6568db91a6a49c6dee8e92abb5ed43cf08481ca3e51abd3cf0d5c830ec9eb5d
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=how+to+play+pokemon+diamond+on+chromebook In PDF document text
    • http://files.musee-baronmartin.fr/uploads/1/3/1/8/131871698/0dc348fb90.pdfIn PDF document text
    • http://poleza.lacenguyen.com/uploads/1/3/0/7/130738909/dokus.pdfIn PDF document text
    • http://jizoxizo.whitneybellwriting.com/uploads/1/3/1/1/131163634/2162534.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/1/0496/5944/5401/files/kegawulegi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3028/1377/files/jezaveponudu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/4227/8042/files/vavudopixinezumeto.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/8837/5715/files/political_science_northwestern_honors.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0468/9667/7026/files/nationalism_revolution_global_regents_essay.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4111/9647/files/inglourious_basterds_watch_online_free_hd.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2428/4824/files/6858663654.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/6211/1637/files/kopozijutasuxokojirizovot.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_off00005f25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F25 5496 bytes
SHA-256: d73eb4cfac6c0c8a8192e7a206bf1e7b9d04926e90aa94ababefd5b9386c497c
font_01_sfnt_off000071bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71BF 10056 bytes
SHA-256: 8093e1cdcfb8b2935685ecbf1b5c50a8d5f6d355219632f843fe11f6aa91167b