Malicious PDF — malware analysis report

Static analysis result for SHA-256 d45f6a8cc3c829e3…

MALICIOUS

PDF

87.2 KB Created: 2021-04-17 00:15:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 929940b56b245b69afe82ec6fd5af85e SHA-1: 33e0d25b2ffe82e8ad3d3da38f42d5b095577718 SHA-256: d45f6a8cc3c829e388acd7b7c775c06dc9134f638f62bc1d7bbc5b4b6fb820d8
126 Risk Score

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 0.9988

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://gimoguvi.ru/strik?utm_term=lista+de+verbos+en+franc%25C3%25A9s+conjugados+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4454047/normal_605df7db2e15d.pdfIn PDF document text
    • https://cdn.sqhk.co/bemovunilupo/VRhczhh/where_s_my_droid_hide_app_icon.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366993/normal_606459c92b470.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366642/normal_5ffe999f2be85.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489609/normal_602f428baac86.pdfIn PDF document text
    • https://cdn.sqhk.co/suxugipajepo/qXjjgh6/life_cycle_of_a_chicken_worksheet.pdfIn PDF document text
    • https://cdn.sqhk.co/xifinelire/hhHhjgd/her_story_book.pdfIn PDF document text
    • http://onlinekartiadesi.com/tewebusinasujezapuvidcq4mc.pdfIn PDF document text
    • https://cdn.sqhk.co/vaxarogajib/tgihaje/losizi.pdfIn PDF document text
    • http://magicwoolshop.com/watercolor_splash_background_tattoo2ofw6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493867/normal_6013ec8bd0200.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478123/normal_603d43a8d6fbe.pdfIn PDF document text
    • http://negeduji.66ghz.com/betezubomebezatederakedo.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://7f03322d-63d6-449b-a8c2-a80beffeb2b6.filesusr.com/ugd/2994dd_ecab0538c2594fa198f4f7d1d2afff7e.pdf?index=trueIn PDF document text
    • http://lafugigolemetuk.rf.gd/zoxejetudefavonufagag.pdfIn PDF document text
    • https://7ef7ebf0-bcb0-4ca2-8538-5a19c3e9f01c.filesusr.com/ugd/aff7ca_1e5542f56cf54cef81f61232940ef0ea.pdf?index=trueIn PDF document text
    • http://suginuzebaluwom.rf.gd/wefenevale.pdfIn PDF document text
    • https://f3ea461b-95fd-44cf-949c-5afda193840f.filesusr.com/ugd/a48928_1a26c1f1f34f4ad6b7b29e1410cf4746.pdf?index=trueIn PDF document text
    • http://jolavewavesuj.epizy.com/ireport_config_java.pdfIn PDF document text
    • https://ec451167-49e0-489e-a150-d7dc0ecf9264.filesusr.com/ugd/fe0276_5117943d42d542e391237029bc93c369.pdf?index=trueIn PDF document text
    • http://lebikur.rf.gd/gutuselikemomoputizo.pdfIn PDF document text
    • https://891dfe3a-8969-4df2-b253-5ccc4ebbb7a0.filesusr.com/ugd/e66789_adab8fe9de4245a9a12c3c5a01b5b03e.pdf?index=trueIn 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2C3 5532 bytes
SHA-256: 84093d1de0feaf3a4dd3d10d08a1f0deb35438f80dd4b9747ceeb299d3d4d423
font_01_sfnt_off0000f557.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF557 1800 bytes
SHA-256: e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d
font_02_sfnt_off0000fde5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDE5 13432 bytes
SHA-256: ffdf04258e3d98d5b2cd0a255e8ef33ddcde2d114e11b254ccd5aeea86b61c38
font_03_sfnt_off0001287e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1287E 16312 bytes
SHA-256: 531e37f64a2e7dc3bfb257675d9e6c644c7b1597f33ba9a969cd005a7ed65660
font_04_sfnt_off00013e09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E09 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378