Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e728dbe57356238…

MALICIOUS

PDF

42.1 KB Created: 2020-06-09 02:20:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-15
MD5: 4e8c1c72b120ca52515e606c049ded1a SHA-1: 4263576ed03c08cd76528c9b26416a1d080320bc SHA-256: 1e728dbe573562386b81db8a0a83b1dc237d4469e86f2e96e15b08adc1aecf68
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external links, as indicated by the PDF_SEO_LINK_FARM heuristic. The document body also contains a prominent URL, 'http://sherifschefssauces.com/uploads/1/3/0/6/130621798/130621798.html#trinity+en+la+biblia+explic%25C3%25B3', which is part of this link farm. This suggests the primary purpose is to redirect users to potentially malicious or unwanted content hosted on numerous domains.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 http://sherifschefssauces.com/uploads/1/3/0/6/130621798/130621798.html#trinity+en+la+biblia+explic%25C3%25B3 PDF link annotation
    • http://ikhouvanlampegat.nl/uploads/1/3/1/6/131606339/1647926.pdfIn PDF document text
    • http://kogosart.com/uploads/1/3/0/8/130814623/kuxewekowipaxowavod.pdfIn PDF document text
    • http://cpanel.flynndistribution.com/uploads/1/3/0/7/130739256/kibudumoni-riguve-lapev-doladodonuzote.pdfIn PDF document text
    • http://webdisk.thesouthchurch.org/uploads/1/3/0/5/130590219/tokufu.pdfIn PDF document text
    • http://bournemouthmindfulness.net/uploads/1/3/0/3/130313158/pedabezugokalib-somotepuva.pdfIn PDF document text
    • http://taxpackagepromo.com/uploads/1/3/0/5/130547659/vajav-kabamebo-saboxevanodu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://lutopisa223314003.files.wordpress.com/2020/06/39532822638.pdfIn PDF document text
    • https://kudivex.files.wordpress.com/2020/06/50663331133.pdfIn PDF document text
    • https://lawivomeru.files.wordpress.com/2020/06/sinogatolu.pdfIn PDF document text
    • https://topevuzul.files.wordpress.com/2020/06/56734620165.pdfIn PDF document text
    • https://kojesurobiza.files.wordpress.com/2020/06/vadazijaxakozeg.pdfIn PDF document text
    • https://tenejokago.files.wordpress.com/2020/06/99652147090.pdfIn PDF document text
    • https://forerojapu946186861.files.wordpress.com/2020/06/43254986861.pdfIn PDF document text
    • https://jafinuxapa.files.wordpress.com/2020/06/dabopipapixewimifuraz.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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000767a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x767A 11152 bytes
SHA-256: 8b365fb0c02ec342e7f67b0e9c425cc96a38a8ca757e1ec0e27601a924fbb715