Malicious PDF — malware analysis report

Static analysis result for SHA-256 82b349421c808eda…

MALICIOUS

PDF

93.1 KB Created: 2021-04-10 00:25:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 7b1c4e0dc94f17b475f599812e1ea3e2 SHA-1: 81d7d1bfcc8f93a87d682d99146e8d752983c057 SHA-256: 82b349421c808eda2e0f8f1773acd7efb6381b986145d149ead3f79bc053d756
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many of which are dynamically generated, indicating a link farm or phishing attempt. The primary URL, 'https://kuzutuzo.ru/strik?utm_term=how+to+use+xfinity+wifi+box', is presented as a lure. While no scripts were explicitly extracted, the PDF structure and the presence of numerous external links strongly suggest malicious intent, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://kuzutuzo.ru/strik?utm_term=how+to+use+xfinity+wifi+box PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4384150/normal_6026d47da17db.pdfIn PDF document text
    • https://cdn.sqhk.co/ralofobo/6jfgfsP/98128809440.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379720/normal_6020b3e4450f2.pdfIn PDF document text
    • https://cdn.sqhk.co/fibapezo/5jeggpW/pojenoz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369776/normal_601959c490cdc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383566/normal_5fce11d7edef6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465705/normal_602466fe1479c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://b9a4c3d6-4ccf-4d04-9b0f-c2e9c357e15d.filesusr.com/ugd/e5cbe5_a4638912e18e4be2986b3ecdfaaa3d3d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nuruvapozixix/36797580265.pdfIn PDF document text
    • https://49432a94-54bc-4d13-9d12-ea41d731e1b8.filesusr.com/ugd/a7c689_eb81e54fdfc14c259d401da75f0d44dd.pdf?index=trueIn PDF document text
    • http://sulorowanutabu.atwebpages.com/adinkra_symbols_and_meanings.pdfIn PDF document text
    • https://3c4962d9-41f7-4f14-8396-dad57cc8de20.filesusr.com/ugd/a2de88_e8ae7c0214f147f380e52586feb5690d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dugibabafod/lepuwirusezisibeli.pdfIn PDF document text
    • https://s3.amazonaws.com/zewimu/free_3d_cartoon_movie_maker_software_download_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/xebuvuwov/24918222864.pdfIn PDF document text
    • https://s3.amazonaws.com/likerajatob/balloon_1080p_video_songs.pdfIn PDF document text
    • https://30621b86-6952-4b41-80af-4d24d830bc7c.filesusr.com/ugd/122077_42d2f81d16f044beaa33ad7ffc10ddee.pdf?index=trueIn PDF document text
    • http://kexomun.myartsonline.com/how_to_learn_english_grammar_in_tamil.pdfIn PDF document text
    • https://c8d0f166-86fd-441b-8df5-aa5e6c6c7644.filesusr.com/ugd/f4b3af_07c6fb5e119742d490ecbf4343eb5938.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gonafoziguwewe/why_wont_my_keurig_duo_brew_a_full_pot.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011895.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11895 4788 bytes
SHA-256: a29fc552e2937a8b98f0c07efd802253fb96fae41529fa37e4c8ec94c936931d
font_01_sfnt_off00012916.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12916 12172 bytes
SHA-256: 7a560e96426fc2fde62e6722b248476fd7152e4160d3bcf5a630d425c8648c3b
font_02_sfnt_off0001528e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1528E 16060 bytes
SHA-256: d1a84ba8f0e4a827a048d387db8dd5dae3538f1c7e72415b16af587a9947cdc7

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