Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc011f9f0d8f6ae3…

MALICIOUS

PDF

41.4 KB Created: 2020-08-16 19:01:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: e74993912f0075c41749780bd2d5a176 SHA-1: 20275967d9305c11580074bdb1ddb6bfcd12e4c7 SHA-256: fc011f9f0d8f6ae3d7224703e9e75da36952c34c2158dd34d05aa61d41990431
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.com/pify?keyword=antiemetics+chemotherapy+guidelines In PDF document text
    • http://wizikopa.customgemcutter.com/uploads/1/3/0/7/130739140/c525373f7544a49.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0862/9659/files/dolasiromubiwikaxo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7141/5196/files/xinoxuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8216/2084/files/jugonuvetosofozoni.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1669/8526/files/xapaxuxopinawaxok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2609/6036/files/fijigu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8194/8567/files/65461424234.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9939/8052/files/wamozesotepu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9095/8749/files/25350027523.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000055e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x55E1 5576 bytes
SHA-256: c4fc7197b59e4ffb9fbcecff98899064be482a66f148821f26e5278be493f5ee
font_01_sfnt_off000068a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68A3 6068 bytes
SHA-256: d2d10b6b0c668cf26faa9347c7054f8580c7eefa5cb7aecda2a4fba74bd025f0
font_02_sfnt_off00007853.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7853 9532 bytes
SHA-256: 3115fa0ebc678caf23b27bd56cf106fe2008c6b61bfcff6333c07a110f95f1b7