Malicious PDF — malware analysis report

Static analysis result for SHA-256 e55c05882bd800d2…

MALICIOUS

PDF

29.3 KB Created: 2020-04-21 06:47:00 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 0029a7391a73a7d97a8894c09e13ab56 SHA-1: 57ec5e5afa8ec6ad3b2a359b787367b5ff946aa8 SHA-256: e55c05882bd800d24fe21f216af28eb1da991e513bf336e388dda635b6ba9532
92 Risk Score

Malware Insights

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

The PDF file contains a large number of external links to other PDF files hosted across numerous domains. This behavior is indicative of a link farm or SEO manipulation tactic, potentially used to distribute malware or engage in phishing. The ML classifier strongly flagged this PDF as malicious, supporting the suspicious nature of the embedded links. No scripts were extracted from this sample, limiting the ability to determine specific payload delivery mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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
  • 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://misbailes.com/uploads/1/3/0/7/130776213/130776213.html#causative+exercises+pdf+with+answers
    • http://gemmavalentine.net/uploads/1/3/1/3/131380756/miloviburefu.pdf
    • http://jewelryjunkie.net/uploads/1/3/1/3/131382673/add8f5.pdf
    • http://brainiacmenu.com/uploads/1/3/0/5/130541103/ginuxevorakebofet.pdf
    • http://keepingupwiththeshaws.com/uploads/1/3/0/2/130271078/b5ae2aa8f.pdf
    • http://rockymountainbernedoodles.net/uploads/1/3/0/5/130541186/1e54ad.pdf
    • http://eyereflect.us/uploads/1/3/0/9/130969685/jilanegizug.pdf
    • http://tribecandle.com/uploads/1/3/0/3/130379504/makijudo.pdf
    • http://irvinetowtrucks.com/uploads/1/3/1/3/131384638/1721df951b028.pdf
    • http://digitaljammix.com/uploads/1/3/0/4/130483322/lefuvosasuzigop_jalavada_zasasimuzezu_kikoxus.pdf
    • http://marianasumerced.com/uploads/1/3/0/6/130639939/2893556.pdf
    • http://jjustonemore.com/uploads/1/3/0/6/130640107/mipubedume.pdf
    • http://empoweredptbirth.com/uploads/1/3/1/1/131163865/4720b6.pdf
    • http://holsun.net/uploads/1/3/0/3/130324037/3189220.pdf
    • http://jimcolleran.net/uploads/1/3/0/6/130621470/volasozoziromosifof.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_off00004def.bin
4f710dd9f4877c45d05a28967282696d277e0b9eb0cb04407c6192a99b0a0a87		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4DEF 6784 bytes

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