Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4179bf075153d89…

MALICIOUS

PDF

62.9 KB Created: 2020-12-02 19:01:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: b67bbb1cd7b2c741700f41a00e26fb1a SHA-1: ba0bf688bffd1dacd3a297fd17840ac68c1dd361 SHA-256: b4179bf075153d89fdc2115d90994166ccafa17393b70e401ddc4d23740f3560
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a heuristic firing for a link farm, pointing to the URL 'https://traffset.ru/aws?utm_term=canciones+de+cumplea%25C3%25B1os+para+ni%25C3%25B1os'. Although the document body is heavily garbled, the presence of this URL suggests a phishing or malware distribution attempt disguised as child-friendly content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffset.ru/aws?utm_term=canciones+de+cumplea%25C3%25B1os+para+ni%25C3%25B1os PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4390681/normal_5f928bc3cb8e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4527345/normal_5fbd5fd0f2a99.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/venunigimok.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370304/normal_5f8ab1a8f11ca.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf5b0fa97599144eeebfa8/1606376218639/95920664934.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2e8cb2bbd74065813b48b/t/5fc4da2fe6d49a06bb2b076d/1606736431545/50715048955.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c12b6dd-a6d8-4d23-9125-a6de9c8264ac/clueless_1995_google_drive_mp3.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0bdc717e7202640e9644a/t/5fc17d4861e25426e17093d0/1606516043840/ffxiv_white_mage_guide_2019.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d0065e8e827d428d60b5/t/5fc2e8303c6ccf69f3bede99/1606608945642/geometric_means_worksheet_answer_key.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc144dc68612547ed60a5eb/t/5fc5094af81c9a2a0c4162fc/1606748491485/87477546992.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdffd03c02f22b9dd3a911/1606287313289/primos_trail_camera_sale.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1954caffbf90a66ef50b6/t/5fc6c2965fecd2174b4830cf/1606861463318/best_app_for_premier_league_player_stats.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc14748c89e1c4b8fc0f61a/t/5fc542802dd96f59189a0f98/1606763136501/jep_and_jessica_family.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_off0000b167.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB167 5336 bytes
SHA-256: be6c547203087c9d59490f508e3284681a261fc928bc5187d27ea894ca886bc7
font_01_sfnt_off0000c323.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC323 1800 bytes
SHA-256: 51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
font_02_sfnt_off0000cbb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBB1 10160 bytes
SHA-256: b0362bbcdacbb4504ecb90758da572815b4eac79bf0d2ae0183d32fc1b3add8d

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