Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b7e9dba370a0bcf…

MALICIOUS

PDF

36.0 KB Created: 2020-03-11 13:44:18 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: c565ec6b68ca1520e72a4a2b776bf403 SHA-1: a832b2b95259480fe675a068c02a9fc817519512 SHA-256: 0b7e9dba370a0bcf134905576cdca35f18c13a93518a91cc147204a36060ed18
104 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which point to other PDF files, suggesting a link farm designed to distribute malicious content. The document body, though partially obfuscated, contains URLs that likely lead to further malicious downloads. The ML classifier strongly indicated maliciousness, supporting the interpretation of this PDF as a distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://k0gyr.slpny.com/uploads/1/3/0/6/130639183/130639183.html#profit+and+loss+statement+template+word+doc
    • http://toptierdance.com/uploads/1/3/0/4/130476981/xizukenoguje.pdf
    • http://www.wasboring.com/uploads/1/3/0/7/130775778/4797ff95d.pdf
    • http://drterris.com.au/uploads/1/3/0/6/130621587/2292a.pdf
    • http://dynamiccreditcoaching.com/uploads/1/3/0/5/130588571/458188.pdf
    • http://autodiscover.hpuc.org/uploads/1/3/0/4/130488970/c1554065402a4.pdf
    • http://april-johnson.com/uploads/1/3/0/8/130813320/nowovivifanafisi.pdf
    • http://mikejapan.com/uploads/1/3/0/7/130739143/7d822776bf.pdf
    • http://loramaephoto.com/uploads/1/3/0/5/130551483/6316426.pdf
    • http://shotbyraquel.com/uploads/1/3/0/6/130639901/4670057.pdf
    • http://shantural.com/uploads/1/3/0/6/130639998/wukepitovajiwu-xovowivutegobav.pdf
    • http://christinaduvarney.com/uploads/1/3/0/4/130477048/4820194.pdf
    • http://www.papergrouppro.com/uploads/1/3/0/5/130552053/2578847.pdf
    • http://www.shop-dis.com/uploads/1/3/0/5/130588333/9af82f1b.pdf
    • http://admiralsigns.us/uploads/1/3/0/8/130814995/jifefuxawujifikakidi.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_off0000655e.bin
8b0386228f01dccb7ccb8da5d25a66767cee88904304f3ef53c41b4275f8d9be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x655E 7572 bytes

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