Malicious PDF — malware analysis report

Static analysis result for SHA-256 6420c634007e5c95…

MALICIOUS

PDF

41.5 KB Created: 2020-10-07 04:22:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: b127b4fd37f6488e48c28fb202b273d5 SHA-1: 6007a61d5c5b0870ae2a89786ce7fd964b70a9f3 SHA-256: 6420c634007e5c95f89f7620278cf8d97317dae80c3a20d808b6f9cfce372303
234 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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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.club/pify?keyword=buy+adsense+account In PDF document text
    • https://site-1038311.mozfiles.com/files/1038311/wirapu.pdfIn PDF document text
    • https://site-1039576.mozfiles.com/files/1039576/33129119532.pdfIn PDF document text
    • https://site-1038867.mozfiles.com/files/1038867/tunuzisuwolebomadizemiz.pdfIn PDF document text
    • https://site-1039375.mozfiles.com/files/1039375/lemawupiwuwukamej.pdfIn PDF document text
    • https://site-1036872.mozfiles.com/files/1036872/96491745098.pdfIn PDF document text
    • http://nusovuza.weatherpaige.com/uploads/1/3/1/1/131163774/tufexi_lekifewukele.pdfIn PDF document text
    • http://files.haywardfitnessfanatics.com/uploads/1/3/0/8/130874413/dugen.pdfIn PDF document text
    • http://vujufode.jpprezz.com/uploads/1/3/0/7/130776824/xukolorejivuju_towepas_wiwijumupez.pdfIn PDF document text
    • http://nowod.keechakaussies.com/uploads/1/3/1/3/131379256/92298cbdf8dc.pdfIn PDF document text
    • http://files.valeriesavarie.com/uploads/1/3/1/1/131163615/vizalebodibiz-kigigojo-lunaninaxazot.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/1/0479/2998/3132/files/the_hedge_knight.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/3809/2707/files/scary_voices_talking.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/4944/6307/files/duvapepuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2571/0752/files/13827364550.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_off000066c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66C0 4956 bytes
SHA-256: 7e8b4c664429db28d78783c262df20dd2db125898e2fcac420e551475d8a5108
font_01_sfnt_off000077be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77BE 9984 bytes
SHA-256: 9b18677cd6810362b3aa27b0cd100f38b4b0f5c2eb548e945cf7115c44653cfe

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