Malicious PDF — malware analysis report

Static analysis result for SHA-256 11a73e2b61faa9cb…

MALICIOUS

PDF

53.5 KB Created: 2020-10-13 21:45:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 4e1033fda6649cfde7a367e100272eaf SHA-1: 789c749d23b61903e3650a4d8734a4e83df29cca SHA-256: 11a73e2b61faa9cb0a2cad86f5fcbb30857a4df1d1b43aabd274fe0101887668
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://cctraff.ru/strik?keyword=club+factory+apk+app In PDF document text
    • https://site-1039391.mozfiles.com/files/1039391/bigazezutiropumezonab.pdfIn PDF document text
    • https://site-1038511.mozfiles.com/files/1038511/tewepolejegedaruvubole.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/059d55fbff3.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/zutilipevozafeguwu.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/1392291.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d50a2078-b840-4f97-805c-2a5579533339/81245548243.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40d39b77-9486-413c-a336-dfb84c0d3f71/kudakumepotokisosufisuji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e51dec5e-20a7-4ae0-92f5-ff10198799c1/gekanizeser.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/9433/8453/files/bride_of_chucky_doll_replica.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/3186/2679/files/8202363284.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006bf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BF8 5044 bytes
SHA-256: 185604624f1f79ebefbc7f0c8e173195d91610089c6db4bac8ec1b7526fe240f
font_01_sfnt_off00007d32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D32 4596 bytes
SHA-256: d755d6a64c434a736d79fa476660c07667d7ffa8bd3127db2babf62ad62bdf0b
font_02_sfnt_off00008e63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E63 10640 bytes
SHA-256: ec8da1482ec160a64cf86ad49d5f60c7ec6d6f112c03cced9878e573ee07b6d0
font_03_sfnt_off0000b2fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2FE 16284 bytes
SHA-256: 4dec3e8c2c4adb6e335ae15493bc469687bb61a71dcf0c94628bf3e67fd83929

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