Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3b3aa1597a783cb…

MALICIOUS

PDF

59.6 KB Created: 2020-08-02 19:04:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 59c4a827846405b591b5ccb63c8df026 SHA-1: 0b097cd0eaf4999ae3a1c2a5205f6acb62df9982 SHA-256: f3b3aa1597a783cbbd8ca1b5638a3ce70a5e33fb2f811deb077645b82bfd31bf
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://ttraff.cc/pify?keyword=vrc+avatar+descriptor In PDF document text
    • http://files.classiccityfirewood.com/uploads/1/3/2/7/132710795/jaxeselo_zopug.pdfIn PDF document text
    • http://files.vintagepurples.com/uploads/1/3/2/8/132816195/rokuxewulavujuxew.pdfIn PDF document text
    • http://files.scriptcastle.com/uploads/1/3/0/8/130814308/39de93.pdfIn PDF document text
    • http://files.boasc.co.uk/uploads/1/3/1/4/131408117/ee4cbff8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2821/8010/files/gerewuxaxawukefawapiko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1620/8036/files/30879001070.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6108/4322/files/bowibololanon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7405/2503/files/64584391122.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1334/0316/files/discord_webhook_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8307/9592/files/recursive_function_javascript.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4987/6630/files/sevovowagojetapu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0191/3244/files/86349560718.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7002/8966/files/54645075568.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6995/4453/files/wosetametelijapimoxejupur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7594/5126/files/mekenizokizepemowemupufe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/8128296882.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5710/9402/files/vupolaxu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2312/2084/files/febid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6808/7701/files/21093669268.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005dba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DBA 20204 bytes
SHA-256: fc32065c4eb57109a254bcb36fa7f6c20dadad04bde0173d52c4638e950e840e
font_01_sfnt_off00009e91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E91 4744 bytes
SHA-256: 2041b4b53d54ebee4c9a22f0be8a6f9f641011c62a5032e5aefa75ebb64543a5
font_02_sfnt_off0000aebf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEBF 9924 bytes
SHA-256: 2497c30f8a3c27f767769f7943792288b6d262f50e503ecfece74bba328109f2
font_03_sfnt_off0000d0c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0C5 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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