Malicious PDF — malware analysis report

Static analysis result for SHA-256 59472f2b5726ceee…

MALICIOUS

PDF

48.7 KB Created: 2020-08-15 08:12:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 58809ebddf1a14da42d1026efac745a9 SHA-1: 2c45a14fc73268febafff02b07eb70442eaae370 SHA-256: 59472f2b5726ceeef1d706bd0a617644d64c99156a1f6008a6ef23f49ea15264
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/pify?keyword=gta+san+andreas+cheats+codes+app In PDF document text
    • http://files.hmunc.org/uploads/1/3/0/7/130739697/vojumewomeluko.pdfIn PDF document text
    • http://ronod.elevatedoralsurgery.com/uploads/1/3/2/3/132302995/7490153.pdfIn PDF document text
    • http://files.montgomerytec.com/uploads/1/3/0/9/130969603/467964da4f.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/1/0432/6912/8354/files/xegajonexutawubusuna.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/3331/8808/files/nvm_install_yarn.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7513/3859/files/illinois_corporate_annual_report_filing_fee.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2862/7099/files/asymptotic_notation_problems_and_solutions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9900/4827/files/magupuwonugaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1552/0935/files/96815894464.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7995/7669/files/demoxujuwibixosaxefola.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0012/6880/files/75224307832.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4311/0555/files/35835448304.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7792/6040/files/sowatajefewe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4190/7100/files/adriana_lecouvreur_libretto.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007385.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7385 4900 bytes
SHA-256: 887f2b5a90820379f1f7dae083c29cc7edd459756e2b4a178afe8d8694d39e17
font_01_sfnt_off0000841b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x841B 10552 bytes
SHA-256: e71c5014b46d8d47ce25a4af31a4135957b27fbbe73ba94f87e072f7350be757
font_02_sfnt_off0000a826.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA826 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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