Malicious PDF — malware analysis report

Static analysis result for SHA-256 05a34695251fa26d…

MALICIOUS

PDF

69.6 KB Created: 2021-03-17 04:00:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 67aab054f62deddb7c47c735004bbcbe SHA-1: 09a2a061d91832d9d469f00b6338571e3c08e2e3 SHA-256: 05a34695251fa26d90c4470f10f2ce62341cebc2b1a580b4b7f6e50f00c18afb
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to user-generated content sites, indicative of a link farm or phishing lure. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and heuristic firings point towards an attempt to redirect users to malicious or deceptive websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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://soxebez.ru/award?keyword=catalogo+basaltex+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4419640/normal_5ffe861c471f2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379237/normal_5fec9be14d5ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383695/normal_6023f50d3c80b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381085/normal_6050ec0880c60.pdfIn PDF document text
    • http://muruxilirafet.iblogger.org/wap_boss_video_song.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427514/normal_601237ceaf685.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://7162f0c1-3bb2-4775-9ad2-1e34613fb889.filesusr.com/ugd/595093_c33b462fe94543498a3004dae512d437.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sizabo/asus_p8z68-v_pro_bios_windows_10.pdfIn PDF document text
    • http://gotuziput.epizy.com/algorithm_method.pdfIn PDF document text
    • https://s3.amazonaws.com/welanisowari/android_os_for_pc_dual_boot.pdfIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/89736708708.pdfIn PDF document text
    • https://807eaacf-9fb6-4e16-bcb8-061395d1d132.filesusr.com/ugd/a3ef2e_3d9a6de73c3b4d6a8e41e89dcf87748d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kudowo/segixusuloja.pdfIn PDF document text
    • https://s3.amazonaws.com/fajeloninesitel/forever_and_always_parachute_piano_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/bifadiwuwileji/2002_ford_explorer_sport_aftermarket_parts.pdfIn PDF document text
    • https://c827806f-f9bf-4fd3-a4ce-e487c020fa79.filesusr.com/ugd/6fd45c_8a31d8a17bf54e2cb273cf9f40c3d1a4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gedexim/artemis_fowl_books_age_rating.pdfIn PDF document text
    • https://s3.amazonaws.com/zazelujeju/minecraft_apk_pc_windows_7_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wibadinavosunom/converting_time_to_minutes_worksheets.pdfIn PDF document text
    • http://vuzabog.epizy.com/gelozuvinufotezapelevofa.pdfIn PDF document text
    • https://s3.amazonaws.com/dazuxujepov/12227655553.pdfIn PDF document text
    • https://4ceac43d-3374-4736-8926-b47930641487.filesusr.com/ugd/3b1191_050b9a3550774672be2987753417ed20.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF83 5228 bytes
SHA-256: f1eae9ad2eee35f747a3997afff349150f84f436dfde69afb26f1f910ede2cfc
font_01_sfnt_off0000e15a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE15A 11692 bytes
SHA-256: cccae7f568eed53989b7db19109900fe40a36c63a429542ddd9671971a88b3b4

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