Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cbd5f3739626739…

MALICIOUS

PDF

60.3 KB Created: 2020-10-30 10:12:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 7f0045921e29bad6487d5fae862da8f6 SHA-1: 90a475c7306db0bfe2c93883b19bfa99cbcc51c8 SHA-256: 8cbd5f373962673978bfda654ef5b5942a217de5040af789e3d8a6b5653557aa
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.me/pify?keyword=metin2+dueling+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367950/normal_5f88c5fe132cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368949/normal_5f9a088076a19.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382189/normal_5f94cda31fe5a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375716/normal_5f8e8677574f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366306/normal_5f874b1b5a67b.pdfIn PDF document text
    • https://s3.amazonaws.com/panalipolifod/zowew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420766/normal_5f9aa1c2b95dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392220/normal_5f94fc6ea5353.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/69242047003.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404105/normal_5f9230c42d5a2.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off000087df.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off000087df.bin)
    • http://www.daltonmaag.com/In extracted file (font_03_sfnt_off0000d60a.bin)
    • https://uploads.strikinglycdn.com/files/44b820da-439a-438d-912e-7e8e26fd4b0a/34199414634.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b3e7c1f-089c-455c-b2d5-493632d008b3/pee_movie_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/3018/4601/files/dizusijibiliwotupa.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 extracted file (font_00_sfnt_off000087df.bin)
    • http://dejavu.sourceforge.netIn extracted file (font_02_sfnt_off0000c177.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_02_sfnt_off0000c177.bin)

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000087df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87DF 4780 bytes
SHA-256: 8a072920339c1b2dc5553ea2927b24c9e666d08fb8c1c1ce177b290fe45e5bd3
font_01_sfnt_off00009804.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9804 12940 bytes
SHA-256: 7e0f6816151aab6592ae493f78e2a8b1f42c49236e875b9d3e84969ba28ce395
font_02_sfnt_off0000c177.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC177 16060 bytes
SHA-256: d7dbcefd5a9d087f9dbd48d87e5b82950a900fa0f666d4a1f78598b818f3f613
font_03_sfnt_off0000d60a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD60A 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333