Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd62831777f3158b…

MALICIOUS

PDF

91.4 KB Created: 2021-03-21 22:51:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: feb8363aae8f6f954596690ee00354a9 SHA-1: 9de1b394cdb829f241801d10e23379862fb84ac0 SHA-256: dd62831777f3158bee5bc1925a87ff28bd606f5bfdc1e5cc93aad4ce7e1df216
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://dugedepap.ru/aws?utm_term=anthony+santos+incansable+popurri+descargar PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366949/normal_5fd812c519e64.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373782/normal_600897d97af86.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453556/normal_60049ee791b1e.pdfIn PDF document text
    • http://amin-ukraine.net/zubopesivabulilxdva.pdfIn PDF document text
    • http://idealica-co.site/33650388274bvmdm.pdfIn PDF document text
    • http://extrameets.fun/puruxositipz0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493266/normal_5fd282075218e.pdfIn PDF document text
    • http://menformula.xyz/litikeligoxqrg4i.pdfIn PDF document text
    • http://dvertsoff.ru/potassium_perchlorate_acid_or_basenq9sb.pdfIn PDF document text
    • http://chebsvet.ru/big_little_lies_trailer89d6i.pdfIn PDF document text
    • http://flathead.us/3411917778518xs9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377933/normal_5ff681112f1ee.pdfIn PDF document text
    • http://coolmag.biz/los_personajes_mas_importantes_de_la_guerra_civil_espaolanjc8n.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xilasisefi/69430347647.pdfIn PDF document text
    • http://nunavaxukozu.onlinewebshop.net/jigibosibiwig.pdfIn PDF document text
    • https://be56f97b-0727-4a8e-a141-4155b83e75ac.filesusr.com/ugd/5034d0_13b0a29b69e04efdb8eb62dbe05e7197.pdf?index=trueIn PDF document text
    • http://lonesopuw.onlinewebshop.net/76825095749.pdfIn PDF document text
    • https://s3.amazonaws.com/tikoweravisixu/limevodefiwum.pdfIn PDF document text
    • https://s3.amazonaws.com/bokexizometun/zopapubilunela.pdfIn PDF document text
    • https://s3.amazonaws.com/poguvelefa/gojak.pdfIn PDF document text
    • https://7162f0c1-3bb2-4775-9ad2-1e34613fb889.filesusr.com/ugd/595093_de4df535c9b94a0c815a45bbdef3c1e9.pdf?index=trueIn PDF document text
    • https://0e01c86c-6ad9-43de-bc04-b8819f410213.filesusr.com/ugd/73c254_323d2ebb2fbf47ee83a2282fe15c7773.pdf?index=trueIn PDF document text
    • http://perexuwofogefo.onlinewebshop.net/xavitevof.pdfIn PDF document text
    • http://fiforeru.atwebpages.com/after_we_fell_book_download.pdfIn PDF document text
    • https://s3.amazonaws.com/jotizifime/autumn_leaf_report_2019.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9DC 6440 bytes
SHA-256: a606a6dede3b99472d2ac97761204782646b5f75106b48d1abccbe9a99ca9a4c
font_01_sfnt_off0000f9d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9D0 5564 bytes
SHA-256: aa51304b3987fa4096e5c8314ffd07701ceeeadcff85316bc6e01f6aa3ca0d84
font_02_sfnt_off00010cb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CB0 4728 bytes
SHA-256: d8fc27b65bc5ac41babfffb50ff80186cd004d54e3f730f3deaf054101341c4c
font_03_sfnt_off00011de3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DE3 11820 bytes
SHA-256: 4cf31b993c99ef11d657604ef4b61b69f2043105ee8b257cd08072c35b04e894
font_04_sfnt_off000144e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144E8 17180 bytes
SHA-256: a76f024a0f58bf84936a7b5f4e3717a6a53bfe6b66d08ea3cb5fde66502e2c0e

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