Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1f39bd37a2efe73…

MALICIOUS

PDF

43.2 KB Created: 2020-09-10 14:15:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 912fc51775d8677473334bc2842bf705 SHA-1: 2eadca7e6fc9cccebfbcb0fbb0b696a66d2fdd87 SHA-256: f1f39bd37a2efe73ff16f669aaef1df29b051400afd87111131ac60dfc8ebc70
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.ru/wix?keyword=example+contract+law+problem+question+answer In PDF document text
    • http://files.lmcakebylisa.com/uploads/1/3/0/8/130813663/016a881b.pdfIn PDF document text
    • http://files.samanthacallender.com/uploads/1/3/1/4/131453253/5ee91c98bfb30f6.pdfIn PDF document text
    • http://files.omahaslumpbuster.com/uploads/1/3/1/4/131437736/9838787.pdfIn PDF document text
    • http://tuvugani.customfitc.com/uploads/1/3/1/0/131070872/2794995.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/a48928_afcb077e0805494f88849707cf183577.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/ce77c6_73dcc4699489445c8b365e57dd7fcd7d.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/405339_a2f154a4cc224d3097fdc48f3fce0789.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/dcfb95_23fb683256044291984ab98bd9ea648a.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/941881_0764379eb46b42e1a0f1974ddd541f2c.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/8b97dd_eedf310f21d94fb48ee06ae6697232da.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/eeb7bd_cef898606d9f49c0a60cc3ba0f825eab.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/0d089b_1b412afdc56541f29e2474d30553031b.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/963627_930a2c201fb645718f6d34fcb94c1417.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/964009_3d42acebe7f1436c82cd48838fc275d8.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/82d61e_51567ddc6430408ab2df14711252d52d.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/6f58fb_5a5dcea3bfd44b43b73444853dc01b2f.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/7f46b5_5db4f1398dc041d28bfc7ed6ac063a6c.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

Related samples 2

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ad8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AD8 5460 bytes
SHA-256: 45ea83a4cf81ab38a12fe0c604cbfbb1da34c7fa3025c310152b024ed2d35f59
font_01_sfnt_off00007d6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D6C 10008 bytes
SHA-256: c3b98477576c7d19bfc5bcfe0f97e56bf36fcb8f6f50d43575222d07b6e59bca

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