Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c9a6ed2ffd35316…

MALICIOUS

PDF

63.8 KB Created: 2020-10-12 05:21:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 0ca6c8e30af63fb10e0dc6f8018f39cf SHA-1: 3075e0dab5abe2b2f74f41e551fc9c926e2fea7d SHA-256: 3c9a6ed2ffd3531633d8e90f7f357cba6c2488b175990cb8785e42c9d1b99ddd
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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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.me/pify?keyword=best+rl+stine+fear+street+books In PDF document text
    • https://site-1038572.mozfiles.com/files/1038572/75844304980.pdfIn PDF document text
    • https://site-1041285.mozfiles.com/files/1041285/192586663.pdfIn PDF document text
    • https://site-1044310.mozfiles.com/files/1044310/vilufozilepises.pdfIn PDF document text
    • http://files.cloud9sporthorses.com/uploads/1/3/1/4/131409884/zagirewesekugix.pdfIn PDF document text
    • http://wararexor.communitycatcarecenter.com/uploads/1/3/1/8/131856743/107400fa.pdfIn PDF document text
    • http://wetamuber.tomikaye.net/uploads/1/3/1/4/131454165/nevolupo_xoxibomuwusadi_berebesukon_fomesutaki.pdfIn PDF document text
    • http://vanen.hooverridge.com/uploads/1/3/1/6/131606069/7481186.pdfIn PDF document text
    • https://site-1039266.mozfiles.com/files/1039266/44226207167.pdfIn PDF document text
    • https://site-1036651.mozfiles.com/files/1036651/jolemogewonunigub.pdfIn PDF document text
    • https://site-1038835.mozfiles.com/files/1038835/fugokaf.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/1/0482/2754/9338/files/fly_me_to_the_moon_ukulele_chords_dm.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/4732/1237/files/pofozamidokalapemujut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/4695/5929/files/albany_medical_school_letters_of_recommendation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/7537/9622/files/selfishnet_for_android.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_off0000bd44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD44 5012 bytes
SHA-256: 2d6b5cff57fdeca98003956abf9de262b15b6d5e1ebce58551c19d3c1e6a1d06
font_01_sfnt_off0000ce63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE63 10512 bytes
SHA-256: b5692a44f26d637374e82bad5f63c1ae7490fe722892b77ed67c4eef531c26dd

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