Malicious PDF — malware analysis report

Static analysis result for SHA-256 fca1090e6e738277…

MALICIOUS

PDF

48.3 KB Created: 2020-11-08 00:08:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 720897432f86cdad1680cf1f7390dab7 SHA-1: d813410c410c9737f4e70ade5fc9d22077405e10 SHA-256: fca1090e6e7382777fa744a7df6f8c1463b1a97bdaa4a2fec3cf5b57724bad9f
96 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to Weebly and f-static.net domains, suggesting a link farm or SEO spam operation. The ML classifier strongly flagged this PDF as malicious. The presence of embedded URLs and the heuristic PDF_SEO_LINK_FARM indicate the primary goal is to redirect users to potentially malicious content or phishing sites.

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 https://traffking.ru/aws?keyword=cms+mips+reporting+2020 PDF link annotation
    • https://xitupiwe.weebly.com/uploads/1/3/4/4/134489196/c21d2e5506da8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404966/normal_5f91943b9166b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391335/normal_5f9f11b21c170.pdfIn PDF document text
    • https://bavejojonosepes.weebly.com/uploads/1/3/1/3/131380601/funibopise-rafutaneg-nijagunax-reliwoga.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382629/normal_5f8f35909b44a.pdfIn PDF document text
    • https://muneberixiloza.weebly.com/uploads/1/3/4/3/134339704/1517625.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388818/normal_5f8f1a8c81e54.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/lipekipuvenuji/advanced_applicators_bakersfield.pdfIn PDF document text
    • https://losorul.files.wordpress.com/2020/11/57406872253.pdfIn PDF document text
    • https://s3.amazonaws.com/risisipajole/artificial_intelligence_course_for_beginners.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_off00007152.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7152 4980 bytes
SHA-256: 86d0da7a209be7ba74bad5bc9cd5dc1c7124bc7f182ba65f4b1a3ccb8f4adad2
font_01_sfnt_off0000822c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x822C 10780 bytes
SHA-256: b36c432d6275e59a7f3f231ad74d1892c95764615000ff563a33e74fae3f9b49
font_02_sfnt_off0000a6e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA6E8 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71