Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1e83ae9cbde631e…

MALICIOUS

PDF

38.9 KB Created: 2020-10-01 15:05:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 726a88d52e6b18138ca867db7b3aa082 SHA-1: 9e2e4ee08677cc71dfab2981a038454677f5fd17 SHA-256: d1e83ae9cbde631ea2c81fa5e20246e762cc1c0ca5817580cc6f4df10ce73559
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://ggtraff.ru/strik?keyword=convertir+de+pdf+a+word+nitro+gratis In PDF document text
    • https://site-1036981.mozfiles.com/files/1036981/18299662673.pdfIn PDF document text
    • http://files.iamscientiste.com/uploads/1/3/1/4/131452815/026a02.pdfIn PDF document text
    • http://files.rvseniors.com/uploads/1/3/1/3/131380083/32611b326d8.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/1/0434/8667/5108/files/83424271100.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/9976/6942/files/51426875639.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/7031/9509/files/poduzerewimakolofafew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6150/2374/files/kenatekamiba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8323/5489/files/les_adieux__la_reine_chantal_thomas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1044/0862/files/6237842918.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2457/9751/files/jofatigasenoxu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9308/2783/files/73882079168.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1518/4290/files/you_are_welcome_in_italian_formal.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_off00004c54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C54 5140 bytes
SHA-256: 7caf3a9f7ee083b62bf4bf6e6e04b913b6dcc3f1d228b51fe2854a74a5d16806
font_01_sfnt_off00005df3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DF3 10224 bytes
SHA-256: 75ce10b7c2bfcc4d1e5735cf58df2f9db1849d3b98d64fcc65b834c8200bda43
font_02_sfnt_off000080ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80AE 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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