Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff68b7115d422a40…

MALICIOUS

PDF

90.2 KB Created: 2020-12-11 14:44:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 59647fb4117bff999e0ca222ba2a917c SHA-1: 194a60b62971ecced8cc351c4a8706313b93c31c SHA-256: ff68b7115d422a40ee2cecc56f3b618716dfb560ddb823242163d6adf3bbc747
156 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is part of a link farm and hosts external URIs, with one primary malicious URL identified. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or a scam. Although no scripts were explicitly extracted, the PDF structure and embedded links point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafffe.ru/123?utm_term=intellicharger+i4+manual PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4451369/normal_5fc4c17a8e840.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408983/normal_5fa715419b9ad.pdfIn PDF document text
    • https://nunezujotegu.weebly.com/uploads/1/3/4/3/134312528/kigozelu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423428/normal_5fa2782c6a35d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5b9c625-c2ee-44b9-b3de-fb89ac4f0b8e/t_mobile_device_unlock_app_unlock_free_code.pdfIn PDF document text
    • https://s3.amazonaws.com/rowubunak/loberetotafukuxivitar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5444be7-304a-4ed9-9061-34d9fcc710ed/como_fazer_livro_sensorial.pdfIn PDF document text
    • https://s3.amazonaws.com/gofiguj/talking_electronics_30_led_projects.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37245306-25b1-4e69-8ced-b11e4647422a/medical_surgical_book_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae0f6edf-9ed4-4ad4-9441-2dde510e5e0c/words_for_range.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0dd9fec917750a3d7b949/t/5fc2e2b34f983757203f1646/1606607540513/14519711424.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66bd599f-35d1-4a4a-9bf0-4fe086e5a641/23113651083.pdfIn PDF document text
    • https://s3.amazonaws.com/geradi/american_anthem_english_crossword_answers.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001162b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1162B 5060 bytes
SHA-256: a15592977d2df4f26e038bab56b1f10e5044873ffee4327c036260e892c3c857
font_01_sfnt_off0001273f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1273F 17636 bytes
SHA-256: 622d00bb2aea92334d26e994c9c827dd0a2c858bfd70f501bc0a22a94f8b4199

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