Malicious PDF — malware analysis report

Static analysis result for SHA-256 61c3146e32218f99…

MALICIOUS

PDF

51.0 KB Created: 2020-08-25 02:21:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 8570fe896f9a18f9679735c45c2be820 SHA-1: b807dfebd5765d89607ca42339b6160a22ff53f1 SHA-256: 61c3146e32218f9926a2a4cbed501341718a69900af904c8f94ccce494c6232f
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.ru/pify?keyword=laboratory+experiments+for+ap+chemistry+answers In PDF document text
    • http://files.dissertationhaiku.com/uploads/1/3/1/0/131069915/lapawosaga.pdfIn PDF document text
    • http://dudavup.britishnatureguide.com/uploads/1/3/0/7/130739693/5da4eed6464526.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/1/0430/6839/1591/files/sixovesilax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4396/3548/files/movijetowefetepulopasij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2280/3366/files/activismo_politico.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4489/6917/files/profile_pictures_for_discord.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3999/7595/files/kixageke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6445/8405/files/whistleblower_protection_act.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0465/4684/5846/files/27671151657.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4457/5131/files/57630203815.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8360/4903/files/books_to_read_in_your_20s_female.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2057/3082/files/soxedol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0378/1015/files/xakegovid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8043/3302/files/wuziwogu.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_off00007b22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B22 5356 bytes
SHA-256: fbdbd62fd322d5611591f6f0007180f608720caf8add5b20b7379fb737648a3f
font_01_sfnt_off00008d3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D3D 10424 bytes
SHA-256: e158d0a86f6ae1aa4815b859611ab5a029923d99b060db1b01181d01cb74faef
font_02_sfnt_off0000b0ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0ED 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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