Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b513a56a9967ca5…

MALICIOUS

PDF

74.0 KB Created: 2021-02-25 16:51:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 4f15ad85c1a27e52974708854bed4f7e SHA-1: 84fd40f401eeeda91d4a8babbc9e8c7ac50de425 SHA-256: 8b513a56a9967ca5a6a982e01df43317878004e419aa4ae8e348fb8c83936d1b
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are hosted on Weebly and CDN domains, suggesting a link farm or phishing campaign. The primary URL, 'https://maypoin.ru/aws?utm_term=how+to+import+midi+file+to+garageband', is presented as a search result, indicating a lure. ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious classification.

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://maypoin.ru/aws?utm_term=how+to+import+midi+file+to+garageband PDF link annotation
    • https://polatubogo.weebly.com/uploads/1/3/4/5/134598163/0c01fcc93c98398.pdfIn PDF document text
    • https://cdn.sqhk.co/jimatoju/iLWohgB/80509463560.pdfIn PDF document text
    • https://cdn.sqhk.co/sarunasol/K3m2iac/sonny_acres_facebook.pdfIn PDF document text
    • https://vutuzanepe.weebly.com/uploads/1/3/1/4/131453188/7063810.pdfIn PDF document text
    • https://cdn.sqhk.co/bukoxomule/jjtqLpj/tnw_aero_survival_rifle_22lr_for_sale.pdfIn PDF document text
    • https://mufiwejugoj.weebly.com/uploads/1/3/4/3/134340856/vaxipikejutefe_dobuver_winarage_lufuxebuvavin.pdfIn PDF document text
    • https://famuvotatag.weebly.com/uploads/1/3/0/8/130813835/1378368.pdfIn PDF document text
    • https://kazigujexumakul.weebly.com/uploads/1/3/4/3/134320364/vesipu.pdfIn PDF document text
    • https://cdn.sqhk.co/wugeguxu/RhfjeLE/48061021864.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vebogotexaf/kudojukode.pdfIn PDF document text
    • https://s3.amazonaws.com/vukumesoj/belly_fat_loss_exercise.pdfIn PDF document text
    • https://s3.amazonaws.com/niporofez/h_m_application_questionnaire_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/resisuna/95243708198.pdfIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/mulobagozesolukidum.pdfIn PDF document text
    • https://s3.amazonaws.com/vonusirukete/fafaxere.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_off0000e349.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE349 5376 bytes
SHA-256: 80ddba1ab419c200f32fc027bafad236d33d85dbe11409b7ce9856eb11c15aa2
font_01_sfnt_off0000f588.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF588 10856 bytes
SHA-256: 3ff9dad0e8ca7574d735cba1c25b5d3c6ae63fc9f60e424528965d0608b51fe2

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