Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b643444ce732df0…

MALICIOUS

PDF

37.7 KB Created: 2020-06-09 01:57:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 17a4d43c2684ce923de13c1145a31272 SHA-1: ac29d7d33903e9d8bbc91c6aac79b12797ba762b SHA-256: 8b643444ce732df05c07153bb8438e8cfb541333eb101630999212e8af98fb93
94 Risk Score

Malware Insights

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

The PDF contains a large number of external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The ML classifier strongly indicated maliciousness. No scripts were extracted, but the PDF structure and numerous embedded URLs suggest a delivery mechanism for further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://narellecridland.com/uploads/1/3/0/8/130874409/130874409.html#la+nuit+obscure+de+l%2527+%25C3%25A2me
    • http://m.jekyllhydeapparel.com/uploads/1/3/0/4/130488217/finevavajom.pdf
    • http://indigofibershed.com/uploads/1/3/0/7/130740080/wexixud.pdf
    • http://christinajallenlcsw.com/uploads/1/3/1/4/131406758/kezuniz.pdf
    • http://mail.krystalgarner.com/uploads/1/3/0/6/130604466/wikotinoruzud.pdf
    • http://galeriazia.com/uploads/1/3/0/6/130604657/7414530.pdf
    • http://theliebmanfamily.com/uploads/1/3/0/8/130873787/nimas.pdf
    • http://hostmaster.suepedley.com.au/uploads/1/3/1/3/131398380/8136161.pdf
    • http://camp-star.de/uploads/1/3/1/8/131856391/nobebisutajulos.pdf
    • http://folsombulldogfootball.com/uploads/1/3/0/5/130590541/4759423.pdf
    • https://niwewex.files.wordpress.com/2020/06/5652630298.pdf
    • https://mufudafu.files.wordpress.com/2020/06/20089228202.pdf
    • https://banibejazona.files.wordpress.com/2020/06/xojesoxiguxege.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000060fa.bin
a6057d53a0b125e479f4b2ea3ff4daae82540ca1a2cdb28b849dddd484cf74cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60FA 13660 bytes

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