PDF malware analysis — malicious · 0f5bdf17ff17d6b1

MALICIOUS

PDF

40.1 KB Created: 2020-06-04 19:31:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 1f1f4cbd9f8db1399ba9d41e49e65f7c SHA-1: dac970dda90ffc4e33df0d0082359c94b0d5dc1b SHA-256: 0f5bdf17ff17d6b10981968b54d60e4db28fa8afb384064344f26651df260fee

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous embedded URLs, many of which are part of a link farm designed to appear as software downloads. The primary URL, http://sta-66-99-58-207.ladse.org/uploads/1/3/1/4/131438501/131438501.html#download+xpadder+5.7+para+windows+7, explicitly mentions downloading software, indicating a lure for potentially unwanted software or malware. The ML classifier strongly supports the malicious nature of this PDF.

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://sta-66-99-58-207.ladse.org/uploads/1/3/1/4/131438501/131438501.html#download+xpadder+5.7+para+windows+7
- http://andylunga.com/uploads/1/3/1/1/131164366/fifesepovefova.pdf
- http://thresholdschool.org/uploads/1/3/0/5/130589218/zoxerosexozara-nubagiwasefodi.pdf
- http://mickpolich.com/uploads/1/3/0/5/130543010/mupuriwa_zolalem.pdf
- http://languagesforallcorp.com/uploads/1/3/1/8/131858403/7011462.pdf
- http://webmail.westfieldvictory.com/uploads/1/3/0/5/130539465/bosibodebebusig.pdf
- http://saltandlightinstitute.org/uploads/1/3/0/9/130969415/gavisujunomonuso.pdf
- http://247eventtickets.shop/uploads/1/3/1/8/131857049/5134107.pdf
- http://sta-66-99-58-207.ladse.org/uploads/1/3/1/4/131438501/terms.html
- http://sta-66-99-58-207.ladse.org/uploads/1/3/1/4/131438501/dmca.html
- http://sta-66-99-58-207.ladse.org/uploads/1/3/1/4/131438501/policy.html
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://tejafuwimu.files.wordpress.com/2020/06/miraximexobewetokunana.pdf
- https://xiwunidavam.files.wordpress.com/2020/06/vedosovexerujugi.pdf
- https://zaxobikatiwi.files.wordpress.com/2020/06/88102929425.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/
- http://scripts.sil.org/OFL
- http://dejavu.sourceforge.net
- http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00005d07.bin` `56369dfe1200bdfa99c90a1194c46382fffccaa94d054f498a955cff49ddd7e9`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5D07	10024 bytes
`font_01_sfnt_off00007f36.bin` `31f54bf1b2a0bd5fcefce680aa7bc0ab7b2c48a0f9a6877104dd616c0c0a5462`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7F36	16160 bytes

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