Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6f3cd3342621c52…

MALICIOUS

PDF

55.3 KB Created: 2020-09-14 09:50:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 8ff02e82ec5350efb4a56037b2f507d8 SHA-1: fe8d5ea7d9882228f41436a1d9bde2406a52ea2d SHA-256: d6f3cd3342621c520812d02cabc240b45241a63bba0f725669b3290069729c04
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.club/pify?keyword=rebel+belle+pdf+espa%25C3%25B1ol In PDF document text
    • http://vifuve.chertsey.school.nz/uploads/1/3/1/6/131637136/61a46fbef3b.pdfIn PDF document text
    • http://files.holisticways.com.au/uploads/1/3/1/8/131872070/patovexigen-kaginewegofev-vujomivuz.pdfIn PDF document text
    • http://files.suwastikanaidu.com/uploads/1/3/1/4/131437750/kojumosudigikenaz.pdfIn PDF document text
    • http://files.amyjcheney.com/uploads/1/3/2/7/132710779/junaxexura.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/1/0434/2002/4989/files/gonetasibenuvatopuda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1264/3227/files/skysoft_dvd_ripper.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3614/6855/files/wejujupup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0332/2269/files/60244648633.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5608/6696/files/annexure_d_for_passport_word_format.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_46727d6a9e3a44e880657e6f3428764c.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/a4e402_9e5622e434c04541aebb6aaaeb841784.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/3ab5ed_5488e0ea92fe4b3ebc446b97b64cecc1.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/d3758e_7c1d6a1981844928bcf7ab2b38445b8f.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9537/5524/files/66448486761.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6197/5971/files/aiou_admission_form_spring_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6386/8573/files/rifemesapevutisigefatazos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6209/9109/files/windows_bitmap_image_to.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_off000077d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77D9 4852 bytes
SHA-256: 0ef55d9223755c556f6e5b160ce6b6037a74fe0ff4b98a9d9d26096da87d812c
font_01_sfnt_off00008859.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8859 10144 bytes
SHA-256: 3cd88b2956f2d07a376518c44d29e9f5ec09137feca322b21bc869f5c6a69e6b
font_02_sfnt_off0000ab17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB17 16092 bytes
SHA-256: ea75db71c9df7250347a03039f742fcd189f5fc3f08964e696816fa8b5227073
font_03_sfnt_off0000bfdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFDF 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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