Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ecb3424c077176e…

MALICIOUS

PDF

73.6 KB Created: 2021-02-05 15:21:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 6bfc0bae5412c5b80bc1ab14b9880e54 SHA-1: 778120d158992b19d02ad5ede503e9451a8dba09 SHA-256: 9ecb3424c077176e3ba82b64bb164daaaeb9c5c89799e243b036e4125af460a0
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to Weebly-hosted PDFs, suggesting a link farm or phishing campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URLs and the heuristic 'PDF_SEO_LINK_FARM' point towards a phishing or malware distribution scheme, likely initiated via spearphishing.

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://baarspo.ru/wb?keyword=blender%20guru%20pro%20lighting%20skies PDF link annotation
    • https://gosesubamumu.weebly.com/uploads/1/3/5/3/135348433/lezud.pdfIn PDF document text
    • https://bozadabeduli.weebly.com/uploads/1/3/4/8/134869561/928466.pdfIn PDF document text
    • http://barashik.space/download_moms_helpnsnhh.pdfIn PDF document text
    • https://cdn.sqhk.co/vopunokapire/3fggjdY/86678241910.pdfIn PDF document text
    • https://xumizobizuzu.weebly.com/uploads/1/3/4/6/134688834/5f0d3179f93a.pdfIn PDF document text
    • https://dupopawo.weebly.com/uploads/1/3/4/6/134652833/vasonemi.pdfIn PDF document text
    • http://womans30planet.com/letras_individuales_para_imprimirurp7i.pdfIn PDF document text
    • https://gawudizilox.weebly.com/uploads/1/3/5/3/135300959/1475707.pdfIn PDF document text
    • https://tatidadimu.weebly.com/uploads/1/3/5/3/135383915/xugubabogadajuz_tijipumafuz.pdfIn PDF document text
    • https://xegugunozom.weebly.com/uploads/1/3/1/4/131482992/6df7b0ddaf94.pdfIn PDF document text
    • https://ligonulijer.weebly.com/uploads/1/3/5/3/135318365/1276186.pdfIn PDF document text
    • https://gojudewusidaza.weebly.com/uploads/1/3/4/8/134888042/derorevusepu.pdfIn PDF document text
    • https://cdn.sqhk.co/nolovojawek/Lgdjeid/livasojogave.pdfIn PDF document text
    • https://cdn.sqhk.co/soxuvezosapa/cturyhf/5213431093.pdfIn PDF document text
    • https://nadatipaj.weebly.com/uploads/1/3/5/3/135347779/5246816.pdfIn PDF document text
    • https://cdn.sqhk.co/gagobuniponi/9HoijAt/dune_1984_rotten_tomatoes.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://s3.amazonaws.com/gitipelut/apocryphal_acts_of_the_apostles.pdfIn PDF document text
    • https://s3.amazonaws.com/mufukep/11425689400.pdfIn PDF document text
    • https://s3.amazonaws.com/zatazewoz/crash_course_biology_14_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/dozore/angular_remove_element_from_formarray.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_off0000d3b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3B5 5004 bytes
SHA-256: d9f7da14f07c7e226acea79f00fd883f8bd05ea82f724833728eff90a28ca1d5
font_01_sfnt_off0000e4ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4AE 11308 bytes
SHA-256: 5636ea679453c7941c07a24b997f26795558e04031cb3eec53cdf49661d5f51e
font_02_sfnt_off00010b48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B48 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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