Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8e343565c548e4f…

MALICIOUS

PDF

55.6 KB Created: 2020-10-17 11:05:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: b1571e0b163a9dce64544d8aa61f66ae SHA-1: fe0c4abcb9c6aa90f30be79923b352dbb302f789 SHA-256: b8e343565c548e4f4d46e831854d3d40460b7aa81715b9031b617b1f2b8a8a08
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/123?keyword=download+messenger+2020+apk In PDF document text
    • https://lodirunesu.weebly.com/uploads/1/3/0/8/130874391/eba620829822202.pdfIn PDF document text
    • https://rewemekekebaz.weebly.com/uploads/1/3/1/4/131406535/koxoxevodom_nejadami_detejobefotok.pdfIn PDF document text
    • https://tavumake.weebly.com/uploads/1/3/2/7/132740551/3587330.pdfIn PDF document text
    • https://gomemetunugup.weebly.com/uploads/1/3/2/7/132712315/riwegetalavenuwulu.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/1/0440/9350/5688/files/dotewosu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/0557/4819/files/35548350990.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/3336/4133/files/jukadigazivunelolanorar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8cd1522d-f074-40f1-8e26-7848acddc224/34020591326.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/605a38f7-6f64-4994-9212-87170da5786d/26024136138.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0515/5227/files/amazon_prime_apk_for_android_tv_4.4.4.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/6109/9675/files/stamina_pt_1690_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9118/2243/files/betpawa_app_tanzania_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e21b8d7-d19a-413a-a0b7-3969a8dbc046/toro_gang_mower_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1399d45-b1d8-4c7b-a1d3-e801434cda19/18587654163.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb25b535-7571-4f81-9aee-a38ec34f2727/fijegudazegutepunojuw.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_007_off0000b17c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xB17C 19268 bytes
SHA-256: 1eddc15ca16b4df2d752d0f0ef68c852e1e00cc4aac1c9154c21487d46782a66
font_00_sfnt_off00006ba6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BA6 3012 bytes
SHA-256: 9f4b9a9fcd4a7fd0527f4694b63b992009dd0bd78dc606659ad1eebee4df53ff
font_01_sfnt_off0000766d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x766D 5708 bytes
SHA-256: a5cbbbd03b1136019b1fb76353ae327e9a5d5fcea1968ffd4933bf2d930046b8
font_02_sfnt_off000089d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89D9 12424 bytes
SHA-256: ebb93e0465b0ca3200b50162cbddf6b63700c6ce1767d6bf52f6f9bbc8d1bee2

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