Malicious PDF — malware analysis report

Static analysis result for SHA-256 589dde6d5255135d…

MALICIOUS

PDF

71.8 KB Created: 2020-11-22 19:18:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 20fc07c2d9560c7580625aab9ead8a2f SHA-1: 9dc44b1d72658537b7b477c5d6c3d0617608c271 SHA-256: 589dde6d5255135dc33fc4feab5cfa86b06b78f4e8fa1eef8284b4a104b8c20b
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a known malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external links, suggesting an attempt to manipulate search engine results or direct users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/123?utm_term=loi+hen+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4413474/normal_5fb7a87c9717c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366371/normal_5f8b4dd781822.pdfIn PDF document text
    • https://jitojadafolad.weebly.com/uploads/1/3/4/4/134404030/4a926f7a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413016/normal_5fa4fefdb7304.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://uploads.strikinglycdn.com/files/edda207b-1eb3-48d7-98a8-1ccfb53520b3/52372064494.pdfIn PDF document text
    • https://s3.amazonaws.com/rowubunak/techniques_of_risk_analysis_in_capital_budgeting.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84339477-ad26-4a5e-9081-c69bf9b3eed8/21123879377.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b365164-4aec-4215-aff8-427790c36b96/mr_wilson_s_nose_part_2.pdfIn PDF document text
    • https://s3.amazonaws.com/bizamesuwepe/oracle_sql_database_for_windows_7.pdfIn PDF document text
    • https://s3.amazonaws.com/dedinavesute/soe_training_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/debamijizozexo/speaking_of_courage_theme.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c7b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7B3 3016 bytes
SHA-256: 1793dcc33cee5f26b6bc5b991c9642c12485cedc1890b817f132fcb666accd26
font_01_sfnt_off0000d278.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD278 4260 bytes
SHA-256: b7bbd0319e1f995d0b3bf90e6da0d12f52a8e9a975f1151712c6a84837786ec1
font_02_sfnt_off0000e0d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0D6 10428 bytes
SHA-256: 978d8ad8b34bc26c5ee6e5b3dce83c472aab539a67b6e7052cd43c5452523ff2
font_03_sfnt_off0001045a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1045A 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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