Malicious PDF — malware analysis report

Static analysis result for SHA-256 907a739542ce13d6…

MALICIOUS

PDF

52.9 KB Created: 2020-06-25 22:02:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-08-25
MD5: 5efdd460605bdab4cf6700a459baa5c2 SHA-1: c2baf71b1f0ce6c7b39abfab9e7fd53c899063a6 SHA-256: 907a739542ce13d6bfab380bb4efdd7a28dbca6a82da4ea14b469fd1b936f615
96 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF document contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various PDF files hosted on different domains, suggesting a link farm or SEO manipulation tactic. The document body itself is heavily obfuscated but contains one of the identified URLs. No scripts were extracted from this sample, limiting the ability to determine further malicious intent beyond link distribution.

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://skinandbodybysarah.com/uploads/1/3/1/3/131383384/131383384.html#aea+pk-12+manual PDF link annotation
    • http://wailelepress.com/uploads/1/3/0/5/130542780/vetovakuwoba-kozuminisogam.pdfIn PDF document text
    • http://coffmannursing.com/uploads/1/3/0/6/130603913/1907911.pdfIn PDF document text
    • http://levelsofminimalism.com/uploads/1/3/0/5/130550949/71cdc218d75.pdfIn PDF document text
    • http://42h.undesirable.us/uploads/1/3/0/5/130545254/6309003.pdfIn PDF document text
    • http://constructionsmetalliques.net/uploads/1/3/1/4/131408024/witijafokuruzekama.pdfIn PDF document text
    • http://sabahraphaelreed.com/uploads/1/3/0/8/130874108/lumodifunisaxaxoxafi.pdfIn PDF document text
    • http://mta-sts.mx.brrclub.com/uploads/1/3/0/8/130813401/birusefotewafida.pdfIn PDF document text
    • http://shonee.shop/uploads/1/3/0/7/130776661/21df25.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://mudobemazi.files.wordpress.com/2020/06/10554338320.pdfIn PDF document text
    • https://fiwidowa.files.wordpress.com/2020/06/10925225983.pdfIn PDF document text
    • https://laxokabe513272239.files.wordpress.com/2020/06/fenifenujobonemi.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007c7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C7C 4604 bytes
SHA-256: 6bfc9af4a4ee40a64a1ccd320853479486a17d4d9e43f1189069b8431f638694
font_01_sfnt_off00008c0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C0B 11112 bytes
SHA-256: a227824af7321b530fb4ba99c8f38dc63483c02fead25c863f729cf2fa69fda1
font_02_sfnt_off0000b201.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB201 16204 bytes
SHA-256: c988415812f594187b0a0ed75dc52802e798e1695b49bd300f8412a65040a449

Open this report in the interactive analyzer, or submit your own file for analysis.