Malicious PDF — malware analysis report

Static analysis result for SHA-256 18ad1fa682b07944…

MALICIOUS

PDF

35.4 KB Created: 2020-10-11 07:53:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 361da19d2b897f7da744091a057dee8d SHA-1: df691f42bacbcd547f10149b5a7cc2333519fc9e SHA-256: 18ad1fa682b079448251d09d69a7893efc4d08f553ed33c202cdf207a4ce4ed5
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://gettraff.ru/pify?keyword=cycle+of+arawn+series In PDF document text
    • http://files.walnutavenuechristianchurch.org/uploads/1/3/1/4/131482916/gekuwoj.pdfIn PDF document text
    • http://files.hwy27yardsale.com/uploads/1/3/1/6/131606168/damiwunanu-dotinas-tajaxojun-xekupoware.pdfIn PDF document text
    • http://files.goodnesstogocatering.com/uploads/1/3/1/6/131607575/govodivisa.pdfIn PDF document text
    • http://xegen.otiesummerschool.com/uploads/1/3/1/6/131637372/5382349568.pdfIn PDF document text
    • http://files.liliarustom.com/uploads/1/3/2/3/132303396/220458.pdfIn PDF document text
    • http://files.elizabethkpetersonlab.com/uploads/1/3/1/3/131384789/sibufajoj-xuvini.pdfIn PDF document text
    • http://nosigitux.hwcroquetclub.com/uploads/1/3/1/6/131636655/3842b9ec70.pdfIn PDF document text
    • http://pakatopir.colorvibeco.com/uploads/1/3/0/9/130968931/lipopu.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/1/0433/9823/4270/files/how_to_be_a_star_at_work_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8340/8557/files/73765453226.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7030/7995/files/how_to_change_facebook_notification_sounds_on_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/6467/4454/files/pokisomob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4802/4741/files/metupozujigevix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/8050/2436/files/once_in_the_brain_alcohol_affects_your.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5367/0822/files/barrons_asvab_study_guide.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_off00004e02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E02 4972 bytes
SHA-256: dee063676b42873be9c60b49f2c3dbcdbc96da4c2e255da5087cf4fe8ab76663
font_01_sfnt_off00005f0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F0A 9940 bytes
SHA-256: 7174aa9a9a32685da11e01bc18289dd7faf21134b2c8617361f66ee73a1d2edf

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