Malicious PDF — malware analysis report

Static analysis result for SHA-256 99faba7b2292b2f6…

MALICIOUS

PDF

48.9 KB Created: 2020-10-06 11:03:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 58026de36334738ff7c24fe0e85e663b SHA-1: fc2a12047d8b2a31e8ab8f0b74bb7255c09e19da SHA-256: 99faba7b2292b2f6b3dec5619982b025e463d22074b9084d89fdac114a1986c8
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://ggtraff.ru/strik?keyword=jonathan+livingston+seagull+summary+pdf In PDF document text
    • https://site-1036971.mozfiles.com/files/1036971/tasalituxezune.pdfIn PDF document text
    • https://site-1036644.mozfiles.com/files/1036644/bisafuxizowosipiguze.pdfIn PDF document text
    • https://site-1037081.mozfiles.com/files/1037081/58700120934.pdfIn PDF document text
    • https://site-1039631.mozfiles.com/files/1039631/52852090052.pdfIn PDF document text
    • https://site-1038765.mozfiles.com/files/1038765/jufamapijujunujugeru.pdfIn PDF document text
    • http://xudesi.nudooro.com/uploads/1/3/0/7/130738955/digotafivif.pdfIn PDF document text
    • http://goverejef.michellestartzman.com/uploads/1/3/1/6/131607600/nuwovavinafogadosul.pdfIn PDF document text
    • http://fadota.tribalsoupproject.com/uploads/1/3/0/7/130738993/bakunuvadix.pdfIn PDF document text
    • http://files.frontrunnerbooks.com/uploads/1/3/0/8/130874683/mofubo.pdfIn PDF document text
    • http://files.columbusrabbit.org/uploads/1/3/0/7/130739214/3d35a8.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/1/0435/5083/4847/files/to_live_in_the_borderlands_means_you_by_gloria_anzaldua_analysis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/0671/7862/files/zelapavibedorow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9901/1738/files/visajunovu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/8481/1940/files/what_is_the_enthalpy_change_for_reaction_1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3419/8684/files/dagutuzezajopivejumubolil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7405/0458/files/71488159298.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4489/5909/files/16182297216.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4509/3530/files/southern_pines_womens_health_southern_pines_nc.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/4244/6741/files/metoprolol_davis_plus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/3211/7916/files/89804076620.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_off00007f94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F94 5608 bytes
SHA-256: 1823f300f8b62cd8ba6e2c1afa76e601dbfbdb166c01a06bbe773112a4c96295
font_01_sfnt_off00009289.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9289 10420 bytes
SHA-256: 3b8bafc1be1fbf2aff90844dd0306ac42518c041bbe6153c70f4d7255f09bcda

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