Malicious PDF — malware analysis report

Static analysis result for SHA-256 05054dcf1ff87175…

MALICIOUS

PDF

50.9 KB Created: 2020-10-02 20:43:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 226f25197f03085ec65b2060867a106b SHA-1: 38f7df5c18d2247321cb2a1f28ee92e7c81e85fd SHA-256: 05054dcf1ff87175736d9caf8c0eff7ebe19b8bf014729c284eeade63c7f7136
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=timothy+morton+hyperobjects+pdf In PDF document text
    • https://site-1036969.mozfiles.com/files/1036969/lisinekol.pdfIn PDF document text
    • https://site-1036861.mozfiles.com/files/1036861/99737231659.pdfIn PDF document text
    • https://site-1036834.mozfiles.com/files/1036834/vidatiwuvipimonasejapid.pdfIn PDF document text
    • https://site-1037824.mozfiles.com/files/1037824/dadoka.pdfIn PDF document text
    • http://files.alohaestatejewelry.com/uploads/1/3/2/8/132814073/jalugofikowepu.pdfIn PDF document text
    • http://fivaj.whakamaramaschool.com/uploads/1/3/2/6/132682892/zefibe.pdfIn PDF document text
    • http://zugegim.drbrendaeabbey.com/uploads/1/3/1/6/131637352/jojakufetoxefifi.pdfIn PDF document text
    • http://fasulexe.adornedcandleboutique.com/uploads/1/3/1/4/131452860/tasivubapeno-temalukojogiri-volizo-jatux.pdfIn PDF document text
    • http://files.potterosaproperties.com/uploads/1/3/2/6/132696304/zisisofob_sisazodidateg.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/1/0432/8754/3964/files/sticky_ninja_academy_regular_show.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6861/1989/files/avid_one_pager_rubric.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/6764/0470/files/facebook_lite_apk_download_uptodown.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8296/3349/files/golf_orbit_mod_apk_android_1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0203/4336/files/direct_versus_inverse_proportions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8420/9056/files/37959564570.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/5328/0153/files/32663354723.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_off00008961.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8961 5420 bytes
SHA-256: 30bd2f669f094906c408b1310ccd5ba846cf8d889748ae0bf1049a3b1617000e
font_01_sfnt_off00009baf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9BAF 10192 bytes
SHA-256: e3eb9a3ab9ce83ddf113130f81929afea5ce8b5b5ef34c02a19c5f007f3bf70a

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