Malicious PDF — malware analysis report

Static analysis result for SHA-256 17722f16539bc793…

MALICIOUS

PDF

81.1 KB Created: 2020-05-22 02:01:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1daa7662c42333d3a1b01e96a41963a7 SHA-1: 4c8bd40e3d3a97021cff07d43083b974d67aa79f SHA-256: 17722f16539bc793ed2479bcd9a440a915d25738577809c6b7f0468098fdaede
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, identified as a link farm. The primary URL points to an HTML file with an Arabic fragment, suggesting a potential lure or redirection mechanism. The ML classifier strongly indicated maliciousness, and the presence of numerous links to other PDF files on various domains supports a pattern of SEO manipulation or content hosting for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9414

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://thesundayboys.org/uploads/1/3/0/7/130738722/130738722.html#%25D8%25A7%25D9%2584%25D8%25AA%25D8%25AD%25D9%2583%25D9%2585+%25D8%25B9%25D9%2586+%25D8%25A8%25D8%25B9%25D8%25AF+%25D9%2584%25D8%25B9%25D8%25B1%25D8%25B6+%25D8%25A7%25D9%2584%25D8%25B4%25D8%25B1%25D8%25A7%25D8%25A6%25D8%25AD+%25D8%25A7%25D9%2584%25D8%25AD%25D8%25A7%25D8%25B3%25D9%2588%25D8%25A8%25D9%258A%25D8%25A9
    • http://petbedcovers.net/uploads/1/3/0/6/130604210/b7ffb2e1e2.pdf
    • http://artword.club/uploads/1/3/0/6/130621161/wikufave.pdf
    • http://dmddisability.com/uploads/1/3/1/4/131453527/5863410.pdf
    • http://brchsf.com/uploads/1/3/0/8/130814065/9d807a54b8c68.pdf
    • http://knightprowindowcleaning.com/uploads/1/3/0/6/130639450/reben.pdf
    • http://howardandassociatesllp.com/uploads/1/3/1/1/131163505/gopop.pdf
    • http://ukgetactive.com/uploads/1/3/0/3/130323600/fenudukivosit.pdf
    • http://partnership-pierreseatery.com/uploads/1/3/0/8/130815437/6637361.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000e231.bin
ea766c2e0960fc024252fdc3e092578fe2ca03a9065a7b9a06078786062bf1a6		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xE231 32312 bytes
font_01_sfnt_off00011a5d.bin
2ac5df80511989807ea773d9d284cb6e9651be7ac74e8c3002df12dff91413b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11A5D 8208 bytes

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