Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee0d27aad3c327d8…

MALICIOUS

PDF

78.2 KB Created: 2020-12-31 23:39:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 28bf459f6457f1ec0db8e96776ce748e SHA-1: b8ed3e4e91c2212c8054e48dbeed482d6cce3207 SHA-256: ee0d27aad3c327d8763750cf64c4fa0ed376800dc065048f343e06ac243f23d0
214 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://traffmen.ru/strik?utm_term=bloom%2527+s+taxonomy+examples+in+english', is identified as a known malicious redirector. The document also exhibits characteristics of a link farm, with numerous external PDF links, suggesting an attempt to manipulate search engine results or distribute further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution.

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
  • 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://traffmen.ru/strik?utm_term=bloom%2527+s+taxonomy+examples+in+english In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368752/normal_5fd675b4bab9b.pdfIn PDF document text
    • https://fizolapojola.weebly.com/uploads/1/3/1/3/131383549/nekuzetetimatu-jesalijitubo.pdfIn PDF document text
    • https://betivina.weebly.com/uploads/1/3/0/7/130774994/1671834.pdfIn PDF document text
    • https://medizagokitoni.weebly.com/uploads/1/3/2/3/132303310/bolinixadavivuxat.pdfIn PDF document text
    • https://vutubazedo.weebly.com/uploads/1/3/2/7/132740780/c8bea7e.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/805185b8-524d-43c3-9ebf-d398286d246f/gross_primary_productivity_equation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/930c74bf-25a8-4a2c-a4f4-3f202fac1a1b/12322879844.pdfIn PDF document text
    • https://s3.amazonaws.com/jasadavebaga/11382763568.pdfIn PDF document text
    • https://s3.amazonaws.com/tanikanaw/sodukamemigive.pdfIn PDF document text
    • https://s3.amazonaws.com/libosokune/atwood_gc6aa-10e_control_board.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85e3c442-2018-4d61-895b-5d36da8f6724/wironipuxe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f213ceaf-f9e7-47de-905c-0db6207bea4f/pennhurst_state_school_and_asylum.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_off0000e693.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE693 5180 bytes
SHA-256: 4cb459fbcfadd211859a0c6ee7f84f5b9de0d019f8206cfc9ecce9aeb1fc8358
font_01_sfnt_off0000f81b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF81B 10960 bytes
SHA-256: e40a2ba3ca6791e96c7e43de611a6f8395409f68730394a524a1cdec44e2c9dd
font_02_sfnt_off00011d5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D5F 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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